# Common Core: 2nd Grade Math : Using Subtraction Within 100 to Solve Word Problems

## Example Questions

### Example Question #511 : Operations & Algebraic Thinking

Mr. Bell has  desks in his classroom, but he only needs  desks because he has  students. How many extra desks does he have?

Explanation:

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 #401 : Isee Lower Level (Grades 5 6) Quantitative Reasoning

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

Explanation:

This is a subtraction problem because we want to know how many goldfish the pet store has left over after the teacher buys the first and takes them away from the store. We take the number of goldfish that the store had and then subtract the number that the teacher bought. .

### Example Question #1051 : Numbers And Operations

On the morning of December 24th, a tree lot had  trees left to sell. By the end of the day, the lot only had  trees left. How many trees were sold?

Explanation:

This is a subtraction problem because we want to know how many trees were taken away, or sold, from the total. We take the number of trees they started with, and then subtract the number of trees they have left to find out how many they sold. .

### Example Question #4 : Using Subtraction Within 100 To Solve Word 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 #1 : Using Subtraction Within 100 To Solve Word 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 #6 : Using Subtraction Within 100 To Solve Word Problems

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

Explanation:

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 #7 : Using Subtraction Within 100 To Solve Word Problems

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

Explanation:

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 #51 : How To Subtract

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

Explanation:

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 #9 : Using Subtraction Within 100 To Solve Word Problems

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

Explanation:

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 #51 : Use Addition And Subtraction Within 100 To Solve One And Two Step Word Problems: Ccss.Math.Content.2.Oa.A.1

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?