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Common Core: 2nd Grade Math : Number & Operations in Base Ten

Study concepts, example questions & explanations for Common Core: 2nd Grade Math

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All Common Core: 2nd Grade Math Resources

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Example Questions

Example Question #1061 : Number & Operations In Base Ten

Solve:

$\frac{\begin{array}[b]{r}69\\ -\ 18\end{array}}{\space }$

Possible Answers:

Correct answer:

Explanation:

When we subtract multi-digit numbers, we start with the digits in the ones place and move to the left.

Let's look at the numbers in the ones place:

$\frac{\begin{array}[b]{r}6{\color{Red} 9}\\ -\ 1{\color{Red} 8}\end{array}}{\ \ \ \ \ {\color{Red} 1} }$

Next, we can subtract the numbers in the tens place:

$\frac{\begin{array}[b]{r}{\color{Red} 6}9\\ -\ {\color{Red} 1}8\end{array}}{\ \ \ \ {\color{Red} 5}1}$

Your final answer should be

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Example Question #1062 : Number & Operations In Base Ten

Solve:

$\frac{\begin{array}[b]{r}25\\ -\ 13\end{array}}{\space }$

Possible Answers:

Correct answer:

Explanation:

When we subtract multi-digit numbers, we start with the digits in the ones place and move to the left.

Let's look at the numbers in the ones place:

$\frac{\begin{array}[b]{r}2{\color{Red} 5}\\ -\ 1{\color{Red} 3}\end{array}}{\ \ \ \ \ {\color{Red} 2} }$

Next, we can subtract the numbers in the tens place:

$\frac{\begin{array}[b]{r}{\color{Red} 2}5\\ -\ {\color{Red} 1}3\end{array}}{\ \ \ {\color{Red} 1}2}$

Your final answer should be

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Example Question #1063 : Number & Operations In Base Ten

Solve:

$\frac{\begin{array}[b]{r}68\\ -\ 33\end{array}}{\space }$

Possible Answers:

Correct answer:

Explanation:

When we subtract multi-digit numbers, we start with the digits in the ones place and move to the left.

Let's look at the numbers in the ones place:

$\frac{\begin{array}[b]{r}6{\color{Red} 8}\\ -\ 3{\color{Red} 3}\end{array}}{\ \ \ \ \ {\color{Red} 5} }$

Next, we can subtract the numbers in the tens place:

$\frac{\begin{array}[b]{r}{\color{Red} 6}8\\ -\ {\color{Red} 3}3\end{array}}{\ \ \ \ {\color{Red} 3}5}$

Your final answer should be

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Example Question #1064 : Number & Operations In Base Ten

Solve the following:

$\frac{\begin{array}[b]{r}32\\ -\ 19\end{array}}{\space }$

Possible Answers:

Correct answer:

Explanation:

When we subtract multi-digit numbers, we start with the digits in the ones place and move to the left.

Let's look at the numbers in the ones place:

$\frac{\begin{array}[b]{r}2\\ -\ 9\end{array}}{\space }$

When the top number is smaller than the bottom number, we have to borrow from the number to the left because we can't take away from since is the smaller number. In this case, we are going to look to the . We only ever need to take away from the number to the left. For this problem, that will leave us with a to replace the . So far, your work should look something like this:

$\frac{\begin{array}[b]{r}^{2} \not32\\ -\ 19\end{array}}{\space }$

Remember, we've borrowed from the tens place, and one ten is equal to . We now add that to the digit in the ones place, 2+10=12 . Your work should look something like this:

$\frac{\begin{array}[b]{r}^{2} \not3\ ^{12}\not2\\ -\ 1 \ \ \ \ \ 9\end{array}}{\space }$

Now, we can subtract the numbers in the once place:

$\frac{\begin{array}[b]{r}12\\ -\ 9\end{array}}{\ \ \ 3}$

Next, we can subtract the numbers in the tens place:

$\frac{\begin{array}[b]{r}2\\ -\ 1\end{array}}{\ \ \ 1}$

Your final answer should be

$\frac{\begin{array}[b]{r}^{2} \not3\ ^{12}\not2\\ -\ 1 \ \ \ \ \ 9\end{array}}{\ \ \ 1\ \ \ \ \ 3}$

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Example Question #1 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Solve:

$\frac{\begin{array}[b]{r}18\\48\\68\\ +\ 22\end{array}}{\space }$

Possible Answers:

158

157

156

155

Correct answer:

156

Explanation:

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left.

3 1

Let's add the digits in the ones place:

8+8+8+2=26

Because the sum is greater than , we have to carry the to the tens place. So far, your work should look like the following:

3 3

Next, we add the numbers in the tens position, including the that was carried over:

3 5

Let's add the digits in the tens place:

2+1+4+6+2=15

Your final answer should be 156

3 4

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Example Question #2 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Solve:

$\frac{\begin{array}[b]{r}43\\36\\11\\ +\ 56\end{array}}{\space }$

Possible Answers:

146

145

147

144

Correct answer:

146

Explanation:

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left.

4 1

Let's add the digits in the ones place:

3+6+1+6=16

Because the sum is greater than , we have to carry the to the tens place. So far, your work should look like the following:

4 2

Next, we add the numbers in the tens position, including the that was carried over:

4 3

Let's add the digits in the tens place:

1+4+3+1+5=14

Your final answer should be 146

4 4

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Example Question #3 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Solve:

$\frac{\begin{array}[b]{r}80\\99\\42\\ +\ 82\end{array}}{\space }$

Possible Answers:

301

302

303

300

Correct answer:

303

Explanation:

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left.

7 1

Let's add the digits in the ones place:

0+9+2+2=13

Because the sum is greater than , we have to carry the to the tens place. So far, your work should look like the following:

7 2

Next, we add the numbers in the tens position, including the that was carried over:

7 3

Let's add the digits in the tens place:

1+8+9+4+8=30

Your final answer should be 303

7 4

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Example Question #1 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Solve:

$\frac{\begin{array}[b]{r}48\\21\\17\\ +\ 46\end{array}}{\space }$

Possible Answers:

134

131

132

133

Correct answer:

132

Explanation:

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left.

8 1

Let's add the digits in the ones place:

8+1+7+6=22

Because the sum is greater than , we have to carry the to the tens place. So far, your work should look like the following:

8 2

Next, we add the numbers in the tens position, including the that was carried over:

8 3

Let's add the digits in the tens place:

2+4+2+1+4=13

Your final answer should be 132

8 4

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Example Question #5 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Solve:

$\frac{\begin{array}[b]{r}53\\11\\66\\ +\ 47\end{array}}{\space }$

Possible Answers:

176

177

174

175

Correct answer:

177

Explanation:

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left.

5 1

Let's add the digits in the ones place:

3+1+6+7=17

Because the sum is greater than , we have to carry the to the tens place. So far, your work should look like the following:

5 2

Next, we add the numbers in the tens position, including the that was carried over:

5 3

Let's add the digits in the tens place:

1+5+1+6+4=17

Your final answer should be 177

5 4

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Example Question #6 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Solve:

$\frac{\begin{array}[b]{r}87\\81\\90\\ +\ 86\end{array}}{\space }$

Possible Answers:

335

344

337

336

Correct answer:

344

Explanation:

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left.

6 1

Let's add the digits in the ones place:

7+1+0+6=14

Because the sum is greater than , we have to carry the to the tens place. So far, your work should look like the following:

6 2

Next, we add the numbers in the tens position, including the that was carried over:

6 3

Let's add the digits in the tens place:

1+8+8+9+8=34

Your final answer should be 344

6 4

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Common Core: 2nd Grade Math : Number & Operations in Base Ten

Study concepts, example questions & explanations for Common Core: 2nd Grade Math

All Common Core: 2nd Grade Math Resources

Example Questions

Example Question #1061 : Number & Operations In Base Ten

Example Question #1062 : Number & Operations In Base Ten

Example Question #1063 : Number & Operations In Base Ten

Example Question #1064 : Number & Operations In Base Ten

Example Question #1 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Example Question #2 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Example Question #3 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Example Question #1 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Example Question #5 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Example Question #6 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

All Common Core: 2nd Grade Math Resources

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