This question tests 2nd grade understanding of solving word problems involving money, including counting coins, adding and subtracting money amounts, and making change (CCSS 2.MD.C.8: Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ¢ symbols appropriately). To solve money word problems, first identify what the problem is asking: counting total (add coin values), finding change (subtract cost from amount paid), combining money (add), or finding remaining (subtract spent from had). Know coin values: penny = 1¢, nickel = 5¢, dime = 10¢, quarter = 25¢, dollar = 100¢ or $1. To count mixed coins, count from largest value to smallest: count quarters by 25s, then dimes by 10s, then nickels by 5s, then pennies by 1s. For example, 2 quarters + 3 dimes + 1 nickel: count 25, 50 (quarters), then 60, 70, 80 (dimes), then 85 (nickel) = 85¢ total. In this problem, Keisha had 90¢ and spent 35¢ on a snack, and needs to find how much is left. To solve, subtract spent from had (90¢ - 35¢ = 55¢ left). Choice A is correct because subtracting 35¢ from 90¢ gives 55¢ left (90 - 35 = 55). The answer 55¢ correctly uses coin values and appropriate operation. Choice C represents a wrong operation (added 90 + 35 = 125 when should subtract for left). This error typically happens when students confuse operations. To help students: Use real or plastic coins for hands-on practice. Teach coin values with visuals and rhymes: 'Penny 1, nickel 5, dime is 10, we're still alive! Quarter's 25, dollars are 100—counting money is so much fun!' Practice skip counting by 25s, 10s, 5s, 1s. Model counting mixed coins: organize coins largest to smallest, count quarters (25, 50, 75), then dimes (85, 95), then nickels (100), then pennies (101, 102)—makes counting easier. For word problems, teach keywords: 'How much money' = count total (add), 'How much change' = subtract (payment - cost), 'How much left' = subtract (had - spent), 'How much altogether' = add (combine). Practice making change: 'Item costs 45¢, I have 50¢. 50 - 45 = 5, so 5¢ change.' Use manipulatives and real-world scenarios (classroom store, earning money for chores). Emphasize coin values: dime is smaller than nickel but worth more (10¢ > 5¢). Watch for: wrong coin values, adding when should subtract (or vice versa), counting number of coins instead of value, incomplete counting, answering different question (gave cost when asked for change), arithmetic errors, mixing cents and dollars.

This question tests 2nd grade understanding of solving word problems involving money, including counting coins, adding and subtracting money amounts, and making change (CCSS 2.MD.C.8: Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ¢ symbols appropriately). To solve money word problems, first identify what the problem is asking: counting total (add coin values), finding change (subtract cost from amount paid), combining money (add), or finding remaining (subtract spent from had). Know coin values: penny = 1¢, nickel = 5¢, dime = 10¢, quarter = 25¢, dollar = 100¢ or $1. To count mixed coins, count from largest value to smallest: count quarters by 25s, then dimes by 10s, then nickels by 5s, then pennies by 1s. For example, 2 quarters + 3 dimes + 1 nickel: count $25, 50$ (quarters), then $60, 70, 80$ (dimes), then $85$ (nickel) = $85¢$ total. In this problem, Chen has 80¢ and spends 1 quarter, which is 25¢, and needs to find how much is left. To solve, subtract the spent amount from what he had ($80¢ - 25¢ = 55¢$ left). Choice B is correct because subtracting 25¢ from 80¢ gives 55¢ ($80 - 25 = 55$). The answer 55¢ correctly uses coin values and appropriate operation. Choice D represents an arithmetic error ($80 - 25 = 105$, but that's adding instead of subtracting). This error typically happens when students confuse operations or make calculation mistakes. To help students: Use real or plastic coins for hands-on practice. Teach coin values with visuals and rhymes: 'Penny 1, nickel 5, dime is 10, we're still alive! Quarter's 25, dollars are 100—counting money is so much fun!' Practice skip counting by 25s, 10s, 5s, 1s. Model counting mixed coins: organize coins largest to smallest, count quarters ($25, 50, 75$), then dimes ($85, 95$), then nickels ($100$), then pennies ($101, 102$)—makes counting easier. For word problems, teach keywords: 'How much money' = count total (add), 'How much change' = subtract (payment - cost), 'How much left' = subtract (had - spent), 'How much altogether' = add (combine). Practice making change: 'Item costs 45¢, I have 50¢. $50 - 45 = 5$, so 5¢ change.' Use manipulatives and real-world scenarios (classroom store, earning money for chores). Emphasize coin values: dime is smaller than nickel but worth more (10¢ > 5¢). Watch for: wrong coin values, adding when should subtract (or vice versa), counting number of coins instead of value, incomplete counting, answering different question (gave cost when asked for change), arithmetic errors, mixing cents and dollars.

This question tests 2nd grade understanding of solving word problems involving money, including counting coins, adding and subtracting money amounts, and making change (CCSS 2.MD.C.8: Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ¢ symbols appropriately). To solve money word problems, first identify what the problem is asking: counting total (add coin values), finding change (subtract cost from amount paid), combining money (add), or finding remaining (subtract spent from had). Know coin values: penny = 1¢, nickel = 5¢, dime = 10¢, quarter = 25¢, dollar = 100¢ or $1. To count mixed coins, count from largest value to smallest: count quarters by 25s, then dimes by 10s, then nickels by 5s, then pennies by 1s. For example, 2 quarters + 3 dimes + 1 nickel: count 25, 50 (quarters), then 60, 70, 80 (dimes), then 85 (nickel) = 85¢ total. In this problem, Emma buys a sticker for 45¢ and pays with 2 quarters, which is 50¢, and needs to find the change. To solve, subtract the cost from the payment (50¢ - 45¢ = 5¢ change). Choice B is correct because subtracting the cost 45¢ from the payment 50¢ gives 5¢ change (50 - 45 = 5). The answer 5¢ correctly uses coin values and appropriate operation. Choice A represents a specific error of giving the cost instead of the change (45¢ instead of 5¢ change). This error typically happens when students answer the wrong question or confuse operations. To help students: Use real or plastic coins for hands-on practice. Teach coin values with visuals and rhymes: 'Penny 1, nickel 5, dime is 10, we're still alive! Quarter's 25, dollars are 100—counting money is so much fun!' Practice skip counting by 25s, 10s, 5s, 1s. Model counting mixed coins: organize coins largest to smallest, count quarters (25, 50, 75), then dimes (85, 95), then nickels (100), then pennies (101, 102)—makes counting easier. For word problems, teach keywords: 'How much money' = count total (add), 'How much change' = subtract (payment - cost), 'How much left' = subtract (had - spent), 'How much altogether' = add (combine). Practice making change: 'Item costs 45¢, I have 50¢. 50 - 45 = 5, so 5¢ change.' Use manipulatives and real-world scenarios (classroom store, earning money for chores). Emphasize coin values: dime is smaller than nickel but worth more (10¢ > 5¢). Watch for: wrong coin values, adding when should subtract (or vice versa), counting number of coins instead of value, incomplete counting, answering different question (gave cost when asked for change), arithmetic errors, mixing cents and dollars.

This question tests 2nd grade understanding of solving word problems involving money, including counting coins, adding and subtracting money amounts, and making change (CCSS 2.MD.C.8: Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ¢ symbols appropriately). To solve money word problems, first identify what the problem is asking: counting total (add coin values), finding change (subtract cost from amount paid), combining money (add), or finding remaining (subtract spent from had). Know coin values: penny = 1¢, nickel = 5¢, dime = 10¢, quarter = 25¢, dollar = 100¢ or $1. To count mixed coins, count from largest value to smallest: count quarters by 25s, then dimes by 10s, then nickels by 5s, then pennies by 1s. For example, 2 quarters + 3 dimes + 1 nickel: count 25, 50 (quarters), then 60, 70, 80 (dimes), then 85 (nickel) = 85¢ total. In this problem, Sofia had 35¢ and earned 2 dimes (20¢) more, and needs to find how much she has now. To solve, add the money amounts (35¢ + 20¢ = 55¢ now). Choice B is correct because adding 35¢ + 20¢ = 55¢ shows how much money after earning more. The answer 55¢ correctly uses coin values and appropriate operation. Choice C represents an arithmetic error (35 + 20 = 70 instead of 55). This error typically happens when students make calculation mistakes. To help students: Use real or plastic coins for hands-on practice. Teach coin values with visuals and rhymes: 'Penny 1, nickel 5, dime is 10, we're still alive! Quarter's 25, dollars are 100—counting money is so much fun!' Practice skip counting by 25s, 10s, 5s, 1s. Model counting mixed coins: organize coins largest to smallest, count quarters (25, 50, 75), then dimes (85, 95), then nickels (100), then pennies (101, 102)—makes counting easier. For word problems, teach keywords: 'How much money' = count total (add), 'How much change' = subtract (payment - cost), 'How much left' = subtract (had - spent), 'How much altogether' = add (combine). Practice making change: 'Item costs 45¢, I have 50¢. 50 - 45 = 5, so 5¢ change.' Use manipulatives and real-world scenarios (classroom store, earning money for chores). Emphasize coin values: dime is smaller than nickel but worth more (10¢ > 5¢). Watch for: wrong coin values, adding when should subtract (or vice versa), counting number of coins instead of value, incomplete counting, answering different question (gave cost when asked for change), arithmetic errors, mixing cents and dollars.

This question tests 2nd grade understanding of solving word problems involving money, including counting coins, adding and subtracting money amounts, and making change (CCSS 2.MD.C.8: Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ¢ symbols appropriately). To solve money word problems, first identify what the problem is asking: counting total (add coin values), finding change (subtract cost from amount paid), combining money (add), or finding remaining (subtract spent from had). Know coin values: penny = 1¢, nickel = 5¢, dime = 10¢, quarter = 25¢, dollar = 100¢ or $1. To count mixed coins, count from largest value to smallest: count quarters by 25s, then dimes by 10s, then nickels by 5s, then pennies by 1s. For example, 2 quarters + 3 dimes + 1 nickel: count 25, 50 (quarters), then 60, 70, 80 (dimes), then 85 (nickel) = 85¢ total. In this problem, Jamal buys a sticker for 45¢ and pays with 2 quarters (50¢), and needs to find the change. To solve, subtract the cost from the payment (50¢ - 45¢ = 5¢ change). Choice A is correct because subtracting the cost 45¢ from the payment 50¢ gives 5¢ change (50 - 45 = 5). The answer 5¢ correctly uses coin values and appropriate operation. Choice B represents a specific error: giving the cost instead of the change (45¢ instead of 5¢ change). This error typically happens when students answer the wrong question. To help students: Use real or plastic coins for hands-on practice. Teach coin values with visuals and rhymes: 'Penny 1, nickel 5, dime is 10, we're still alive! Quarter's 25, dollars are 100—counting money is so much fun!' Practice skip counting by 25s, 10s, 5s, 1s. Model counting mixed coins: organize coins largest to smallest, count quarters (25, 50, 75), then dimes (85, 95), then nickels (100), then pennies (101, 102)—makes counting easier. For word problems, teach keywords: 'How much money' = count total (add), 'How much change' = subtract (payment - cost), 'How much left' = subtract (had - spent), 'How much altogether' = add (combine). Practice making change: 'Item costs 45¢, I have 50¢. 50 - 45 = 5, so 5¢ change.' Use manipulatives and real-world scenarios (classroom store, earning money for chores). Emphasize coin values: dime is smaller than nickel but worth more (10¢ > 5¢). Watch for: wrong coin values, adding when should subtract (or vice versa), counting number of coins instead of value, incomplete counting, answering different question (gave cost when asked for change), arithmetic errors, mixing cents and dollars.

This question tests 2nd grade understanding of solving word problems involving money, including counting coins, adding and subtracting money amounts, and making change (CCSS 2.MD.C.8: Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ¢ symbols appropriately). To solve money word problems, first identify what the problem is asking: counting total (add coin values), finding change (subtract cost from amount paid), combining money (add), or finding remaining (subtract spent from had). Know coin values: penny = 1¢, nickel = 5¢, dime = 10¢, quarter = 25¢, dollar = 100¢ or $1. To count mixed coins, count from largest value to smallest: count quarters by 25s, then dimes by 10s, then nickels by 5s, then pennies by 1s. For example, 2 quarters + 3 dimes + 1 nickel: count 25, 50 (quarters), then 60, 70, 80 (dimes), then 85 (nickel) = 85¢ total. In this problem, Marcus has 1 quarter, 3 dimes, and 2 nickels and needs to find the total value. To solve, count quarter by 25s (25), then dimes by 10s (35, 45, 55), then nickels by 5s (60, 65) for a total of 65¢. Choice B is correct because counting 1 quarter (25¢) plus 3 dimes (30¢) plus 2 nickels (10¢) equals 65¢ total. The answer 65¢ correctly uses coin values and the addition operation. Choice D represents a specific error: counted number of coins instead of value (1 + 3 + 2 = 6 instead of 25¢ + 30¢ + 10¢ = 65¢). This error typically happens when students count coins instead of their value. To help students: Use real or plastic coins for hands-on practice. Teach coin values with visuals and rhymes: 'Penny 1, nickel 5, dime is 10, we're still alive! Quarter's 25, dollars are 100—counting money is so much fun!' Practice skip counting by 25s, 10s, 5s, 1s. Model counting mixed coins: organize coins largest to smallest, count quarters (25, 50, 75), then dimes (85, 95), then nickels (100), then pennies (101, 102)—makes counting easier. For word problems, teach keywords: 'How much money' = count total (add), 'How much change' = subtract (payment - cost), 'How much left' = subtract (had - spent), 'How much altogether' = add (combine). Practice making change: 'Item costs 45¢, I have 50¢. 50 - 45 = 5, so 5¢ change.' Use manipulatives and real-world scenarios (classroom store, earning money for chores). Emphasize coin values: dime is smaller than nickel but worth more (10¢ > 5¢). Watch for: wrong coin values, adding when should subtract (or vice versa), counting number of coins instead of value, incomplete counting, answering different question (gave cost when asked for change), arithmetic errors, mixing cents and dollars.

This question tests 2nd grade understanding of solving word problems involving money, including counting coins, adding and subtracting money amounts, and making change (CCSS 2.MD.C.8: Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ¢ symbols appropriately). To solve money word problems, first identify what the problem is asking: counting total (add coin values), finding change (subtract cost from amount paid), combining money (add), or finding remaining (subtract spent from had). Know coin values: penny = 1¢, nickel = 5¢, dime = 10¢, quarter = 25¢, dollar = 100¢ or $1. To count mixed coins, count from largest value to smallest: count quarters by 25s, then dimes by 10s, then nickels by 5s, then pennies by 1s. For example, 2 quarters + 3 dimes + 1 nickel: count 25, 50 (quarters), then 60, 70, 80 (dimes), then 85 (nickel) = 85¢ total. In this problem, Jamal buys a sticker that costs 45¢ and pays with 2 quarters (50¢) and needs to find the change. To solve, subtract the cost from the payment (50¢ - 45¢ = 5¢ change). Choice B is correct because subtracting the cost 45¢ from the payment 50¢ gives 5¢ change (50 - 45 = 5). The answer 5¢ correctly uses coin values and the subtraction operation. Choice A represents a specific error: giving the cost instead of the change (45¢ instead of 5¢ change). This error typically happens when students answer the wrong question. To help students: Use real or plastic coins for hands-on practice. Teach coin values with visuals and rhymes: 'Penny 1, nickel 5, dime is 10, we're still alive! Quarter's 25, dollars are 100—counting money is so much fun!' Practice skip counting by 25s, 10s, 5s, 1s. Model counting mixed coins: organize coins largest to smallest, count quarters (25, 50, 75), then dimes (85, 95), then nickels (100), then pennies (101, 102)—makes counting easier. For word problems, teach keywords: 'How much money' = count total (add), 'How much change' = subtract (payment - cost), 'How much left' = subtract (had - spent), 'How much altogether' = add (combine). Practice making change: 'Item costs 45¢, I have 50¢. 50 - 45 = 5, so 5¢ change.' Use manipulatives and real-world scenarios (classroom store, earning money for chores). Emphasize coin values: dime is smaller than nickel but worth more (10¢ > 5¢). Watch for: wrong coin values, adding when should subtract (or vice versa), counting number of coins instead of value, incomplete counting, answering different question (gave cost when asked for change), arithmetic errors, mixing cents and dollars.

This question tests 2nd grade understanding of solving word problems involving money, including counting coins, adding and subtracting money amounts, and making change (CCSS 2.MD.C.8: Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ¢ symbols appropriately). To solve money word problems, first identify what the problem is asking: counting total (add coin values), finding change (subtract cost from amount paid), combining money (add), or finding remaining (subtract spent from had). Know coin values: penny = 1¢, nickel = 5¢, dime = 10¢, quarter = 25¢, dollar = 100¢ or $1. To count mixed coins, count from largest value to smallest: count quarters by 25s, then dimes by 10s, then nickels by 5s, then pennies by 1s. For example, 2 quarters + 3 dimes + 1 nickel: count 25, 50 (quarters), then 60, 70, 80 (dimes), then 85 (nickel) = 85¢ total. In this problem, Maya has 2 quarters, 1 dime, and 3 pennies and needs to find the total value. To solve, count quarters by 25s (25, 50), then dime by 10s (60), then pennies by 1s (61, 62, 63) for a total of 63¢. Choice A is correct because counting 2 quarters (50¢) plus 1 dime (10¢) plus 3 pennies (3¢) equals 63¢ total. The answer 63¢ correctly uses coin values and the addition operation. Choice B represents a specific error: counting only the quarters (50¢) and forgetting the dime and pennies, giving 50¢ instead of 63¢. This error typically happens when students don't complete all steps or incomplete counting. To help students: Use real or plastic coins for hands-on practice. Teach coin values with visuals and rhymes: 'Penny 1, nickel 5, dime is 10, we're still alive! Quarter's 25, dollars are 100—counting money is so much fun!' Practice skip counting by 25s, 10s, 5s, 1s. Model counting mixed coins: organize coins largest to smallest, count quarters (25, 50, 75), then dimes (85, 95), then nickels (100), then pennies (101, 102)—makes counting easier. For word problems, teach keywords: 'How much money' = count total (add), 'How much change' = subtract (payment - cost), 'How much left' = subtract (had - spent), 'How much altogether' = add (combine). Practice making change: 'Item costs 45¢, I have 50¢. 50 - 45 = 5, so 5¢ change.' Use manipulatives and real-world scenarios (classroom store, earning money for chores). Emphasize coin values: dime is smaller than nickel but worth more (10¢ > 5¢). Watch for: wrong coin values, adding when should subtract (or vice versa), counting number of coins instead of value, incomplete counting, answering different question (gave cost when asked for change), arithmetic errors, mixing cents and dollars.

This question tests 2nd grade understanding of solving word problems involving money, including counting coins, adding and subtracting money amounts, and making change (CCSS 2.MD.C.8: Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ¢ symbols appropriately). To solve money word problems, first identify what the problem is asking: counting total (add coin values), finding change (subtract cost from amount paid), combining money (add), or finding remaining (subtract spent from had). Know coin values: penny = 1¢, nickel = 5¢, dime = 10¢, quarter = 25¢, dollar = 100¢ or $1. To count mixed coins, count from largest value to smallest: count quarters by 25s, then dimes by 10s, then nickels by 5s, then pennies by 1s. For example, 2 quarters + 3 dimes + 1 nickel: count 25, 50 (quarters), then 60, 70, 80 (dimes), then 85 (nickel) = 85¢ total. In this problem, Jamal has 2 quarters, 1 dime, and 3 pennies and needs to find the total value. To solve, count quarters by 25s (25, 50), then the dime by 10 (60), then pennies by 1s (61, 62, 63) for a total of 63¢. Choice A is correct because counting 2 quarters (50¢) plus 1 dime (10¢) plus 3 pennies (3¢) equals 63¢ total. The answer 63¢ correctly uses coin values and appropriate operation. Choice C represents a specific error of counting the number of coins instead of their value (2 + 1 + 3 = 6, but close to 7¢). This error typically happens when students count coins instead of their value or make calculation mistakes. To help students: Use real or plastic coins for hands-on practice. Teach coin values with visuals and rhymes: 'Penny 1, nickel 5, dime is 10, we're still alive! Quarter's 25, dollars are 100—counting money is so much fun!' Practice skip counting by 25s, 10s, 5s, 1s. Model counting mixed coins: organize coins largest to smallest, count quarters (25, 50, 75), then dimes (85, 95), then nickels (100), then pennies (101, 102)—makes counting easier. For word problems, teach keywords: 'How much money' = count total (add), 'How much change' = subtract (payment - cost), 'How much left' = subtract (had - spent), 'How much altogether' = add (combine). Practice making change: 'Item costs 45¢, I have 50¢. 50 - 45 = 5, so 5¢ change.' Use manipulatives and real-world scenarios (classroom store, earning money for chores). Emphasize coin values: dime is smaller than nickel but worth more (10¢ > 5¢). Watch for: wrong coin values, adding when should subtract (or vice versa), counting number of coins instead of value, incomplete counting, answering different question (gave cost when asked for change), arithmetic errors, mixing cents and dollars.

This question tests 2nd grade understanding of solving word problems involving money, including counting coins, adding and subtracting money amounts, and making change (CCSS 2.MD.C.8: Solve word problems involving dollar bills, quarters, dimes, nickels, and pennies, using $ and ¢ symbols appropriately). To solve money word problems, first identify what the problem is asking: counting total (add coin values), finding change (subtract cost from amount paid), combining money (add), or finding remaining (subtract spent from had). Know coin values: penny = 1¢, nickel = 5¢, dime = 10¢, quarter = 25¢, dollar = 100¢ or $1. To count mixed coins, count from largest value to smallest: count quarters by 25s, then dimes by 10s, then nickels by 5s, then pennies by 1s. For example, 2 quarters + 3 dimes + 1 nickel: count 25, 50 (quarters), then 60, 70, 80 (dimes), then 85 (nickel) = 85¢ total. In this problem, Chen had 80¢ and spent 1 quarter (25¢) on an eraser, and needs to find how much is left. To solve, subtract spent from had ($80¢ - 25¢ = 55¢$ left). Choice A is correct because subtracting 25¢ from 80¢ gives 55¢ left ($80 - 25 = 55$). The answer 55¢ correctly uses coin values and appropriate operation. Choice C represents a wrong operation (added $80 + 25 = 105$ when should subtract for remaining). This error typically happens when students confuse operations. To help students: Use real or plastic coins for hands-on practice. Teach coin values with visuals and rhymes: 'Penny 1, nickel 5, dime is 10, we're still alive! Quarter's 25, dollars are 100—counting money is so much fun!' Practice skip counting by 25s, 10s, 5s, 1s. Model counting mixed coins: organize coins largest to smallest, count quarters (25, 50, 75), then dimes (85, 95), then nickels (100), then pennies (101, 102)—makes counting easier. For word problems, teach keywords: 'How much money' = count total (add), 'How much change' = subtract (payment - cost), 'How much left' = subtract (had - spent), 'How much altogether' = add (combine). Practice making change: 'Item costs 45¢, I have 50¢. $50 - 45 = 5$, so 5¢ change.' Use manipulatives and real-world scenarios (classroom store, earning money for chores). Emphasize coin values: dime is smaller than nickel but worth more ($10¢ > 5¢$). Watch for: wrong coin values, adding when should subtract (or vice versa), counting number of coins instead of value, incomplete counting, answering different question (gave cost when asked for change), arithmetic errors, mixing cents and dollars.