# Common Core: 1st Grade Math : Representing and Solving Addition and Subtraction Problems

## Example Questions

### Example Question #41 : Representing And Solving Addition And Subtraction Problems

There are  girls and  boys in Mrs. Ray’s class. How many total students does Mrs. Ray have in her class?

Explanation:

This is an addition problem because we want to know how many total students there are when we put the boys and the girls together. When we put things together we are adding.

We can start at  and count up .

### Example Question #41 : Representing And Solving Addition And Subtraction Problems

For the school play, there are  singing parts and  talking parts. How many total parts are in the play?

Explanation:

This is an addition problem because we want to know how many total parts there are when we put the singing and the talking parts together. When we put things together we are adding.

We can start at  and count up .

### Example Question #42 : Representing And Solving Addition And Subtraction Problems

We ordered a large pizza and a medium pizza. The large pizza has  slices of pizza and the medium pizza has  slices of pizza. How many total slices of pizza are there?

Explanation:

This is an addition problem because we want to know how many total slices of pizza we have when we put the medium pizza slices together with the large pizza slices. When we put things together we are adding.

We can start at  and count up .

### Example Question #43 : Representing And Solving Addition And Subtraction Problems

The pet store has  tanks for frogs. The first tank has  frogs and the second tank has  frogs. How many total frogs does the pet store have?

Explanation:

This is an addition problem because we are putting the frogs in the two tanks together. When we put things together we are adding.

We can start at  and count up .

### Example Question #44 : Representing And Solving Addition And Subtraction Problems

Lisa had  birthday parties to go to this summer. She has already gone to  of them. How many parties does she have left to go to this summer?

Explanation:

This is a subtraction problem because Lisa has alreayd gone to some of the parties that she was invited to, so she has less parties left to go to than she started with this summer.

We can start at  and count back .

### Example Question #41 : Addition And Subtraction Within 20 To Solve Word Problems: Ccss.Math.Content.1.Oa.A.1

Tim’s soccer team has  boys on the team.  of them did not come to practice. How many did come to practice?

Explanation:

This is a subtraction problem because people did not show up for practice, so there will be less people at practice than if everyone had shown up.

We can start at  and count back .

### Example Question #45 : Representing And Solving Addition And Subtraction Problems

Tiffany bought  balloons. On the way to the car, blew away. How many does she have left?

Explanation:

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 #46 : Representing And Solving Addition And Subtraction Problems

Spot has a box of treats with  bones left. The box started off with  treats. How many treats has Spot eaten from the box?

Explanation:

This is a subtraction problem because we want to know how many of the total treats Spot has eaten. We take the total number of treats and then subtract the number of treats that are left in the box. .

### Example Question #47 : Representing And Solving Addition And Subtraction Problems

The baseball team has  balls to practice with. There are  boys on the team. If they each take a ball, how many balls are left over?

Explanation:

This is a subtraction problem because we want to know how many balls are left over after each boy takes one. We start with the number of balls and then subtract the number that was taken. .

### Example Question #48 : Representing And Solving Addition And Subtraction Problems

Jenny has  games. She let her friend use  of them for her birthday part. How many does Jenny have left?