Common Core: 1st Grade Math : Addition and Subtraction Within 20 to Solve Word Problems: CCSS.MATH.CONTENT.1.OA.A.1

Study concepts, example questions & explanations for Common Core: 1st Grade Math

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Example Questions

Example Question #1 : Representing And Solving Addition And Subtraction Problems

A large pizza has  slices. If we eat  slices, how many will be left? 

Possible Answers:

Correct answer:


This is a subtraction problem because we want to know how many slices will be left after we eat some. Since we are eating slices, or taking slices away, we will have less than what we started with. 

We can start at  and count back .

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