All Common Core: 1st Grade Math Resources
Example Questions
Example Question #853 : Operations & Algebraic Thinking
Jenny has games. She let her friend use of them for her birthday part. How many does Jenny have left?
This is a subtraction problem because we want to know how many games Jenny has left after she gives some to her friend. We take the total number of games that Jenny has, and then we subtract the number that she gave to her friend. .
Example Question #853 : Operations & Algebraic Thinking
Sarah got birthday gifts for her birthday. She’s opened of them. How many does she have left to open?
This is a subtraction problem because we want to know how many gifts she has left to open after she’s already opened some of her gifts. We take the total number of gifts she has, and then we subtract the number of gifts that she’s opened. .
Example Question #851 : Operations & Algebraic Thinking
Matt invited of his friends to a cookout. of his friends did not come. How many of his friends did come to his cookout?
This is a subtraction problem because we want to find out how many of Matt’s invited friends were able to come to his party. We take the total number of people that were invited, and subtract the number of people that did not come. .
Example Question #861 : Operations & Algebraic Thinking
Ms. Smith’s class has students. of her students are out with the flu today. How many students are in the class today?
This is a subtraction problem because we want to know how many students in Ms. Smith’s class are in school today out of the total number of students that she has. We take the total number of students and subtract the number of students who are not in school today. .
Example Question #862 : Operations & Algebraic Thinking
Joe has total math problems to complete for homework this week. He wants to get done today. How many will he have left after today?
This is a subtraction problem because we want to know how many homework problems Joe will have left after he completes some of them. We take the total number of problems that he has and subtract the number that he plans to do tonight. .
Example Question #863 : Operations & Algebraic Thinking
Lisa has birthday parties to go to this year. She has already gone to of them. How many parties does she have left to go to this year?
This is a subtraction problem because we want to know how many birthday parties Lisa has left to attend this year. We take the total number of parties that she is invited to, and subtract the number of parties that she has already been to. .
Example Question #461 : Adding And Subtracting Within 20
Mr. Bell has desks in his classroom, but he only needs desks because he has students. How many extra desks does he have?
This is a subtraction problem because we want to know how many desks are left over after all of Mr. Bell’s class sits at a desk. We take the number of desks in his room, and subtract the number of students that he has. .
Example Question #861 : Operations & Algebraic Thinking
Tom went to school with pieces of gum. He left school with pieces. How many pieces did he chew at school?
This is a subtraction problem because Tim's total amount of gum decreased.
We can start at and count back .
Example Question #862 : Operations & Algebraic Thinking
Tiffany bought balloons. On the way to the car, blew away. How many does she have left?
This is a subtraction problem because Tiffany lost balloons so she will have less than what she started with.
We can start at and count back .
Example Question #1 : Knowing How And When To Subtract
To subtract we can count backwards. Start at and count back