### All Common Core: 1st Grade Math Resources

## Example Questions

### Example Question #11 : Addition And Subtraction Within 20 To Solve Word Problems: Ccss.Math.Content.1.Oa.A.1

The pet store has goldfish in a tank. A teacher bought fish for her school’s fish tank. How many goldfish does the pet store have left?

**Possible Answers:**

**Correct answer:**

This is a subtraction problem because the pet store sold some of their fish, so they will have less fish.

We can start at and count back .

### Example Question #11 : 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?

**Possible Answers:**

**Correct answer:**

This is a subtraction problem because Spot has eaten some of the bones, so he has less than what he started with.

We can start at and count back .

### Example Question #11 : Addition And Subtraction Within 20 To Solve Word Problems: Ccss.Math.Content.1.Oa.A.1

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?

**Possible Answers:**

**Correct answer:**

This is a subtraction problem because we want to know how many baseballs are left after the team members each take one.

We can start at and count back .

### Example Question #11 : Addition And Subtraction Within 20 To Solve Word Problems: Ccss.Math.Content.1.Oa.A.1

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

**Possible Answers:**

**Correct answer:**

This is a subtraction problem because we want to know how many games Jenny has left after she gives some away.

We can start at and count back .

### Example Question #12 : Addition And Subtraction Within 20 To Solve Word Problems: Ccss.Math.Content.1.Oa.A.1

Sarah got birthday gifts for her birthday. She’s opened of them. How many does she have left to open?

**Possible Answers:**

**Correct answer:**

This is a subtraction problem because we want to know how many gifts Sarah has left to open after she's already opened some.

We can start at and count back .

Matt invited of his friends to a cookout. of his friends did not come. How many of his friends did come to his cookout?

**Possible Answers:**

**Correct answer:**

This is a subtraction problem because some of the friends that Matt invitied did not come, so the total number of people that did come has to be less than what he invited.

We can start at and count back .

### Example Question #343 : Operations

Ms. Smith’s class has students. of her students are out with the flu today. How many students are in the class today?

**Possible Answers:**

**Correct answer:**

This is a subtraction problem because some of Mrs. Smith's students are out with the flu, so the number of students in class has to be less than the total number of students that she has.

We can start at and count back .

### Example Question #11 : Representing And Solving Addition And Subtraction Problems

Joe has total math problems to complete for homework tonight. He wants to get done before dinner. How many will he have left to do after dinner?

**Possible Answers:**

**Correct answer:**

This is a subtraction problem because we want to know how many homework problems Joe will have left after he does some of them, so he will have less than what he started with.

We can start at and count back .

### Example Question #12 : Representing And Solving Addition And Subtraction Problems

Mr. Bell has desks in his classroom. He only needs desks, how many extra desks does he have?

**Possible Answers:**

**Correct answer:**

This is a subtraction problem because we want to know how many extra desks Mr. Bell has after the he needs are used.

We can start at and count back .

### Example Question #16 : 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 .