Creating and Checking Equations in Word Problems

Maria has 15 apples. She buys some more apples and now has 25 apples. How many apples did she buy? (Create an equation and check for reasonableness.)

• 5

• 20

• 10

• 15

A box contains 8 red balls. If 12 more red balls are added, how many red balls are in the box now? (Write an equation and verify your answer.)

• 25

• 20

• 18

• 15

Tom has 20 stickers. He gives away some stickers to his friend and now has 12 left. How many stickers did he give away? (Formulate an equation and check if it makes sense.)

• 15

• 10

• 5

• 8

Lily read 30 pages of her book. If she reads 20 more pages, how many pages will she have read in total? (Create an equation and assess its reasonableness.)

• 70

• 50

• 60

• 40

A farmer has 50 chickens. He sells some chickens and now has 35 left. How many chickens did he sell? (Write an equation and check if your answer is reasonable.)

• 25

• 20

• 15

• 10

In a classroom, there are 18 students. If 7 more students join, how many students will there be in total? (Create an equation and verify your solution.)

• 25

• 15

• 30

• 20

Jake has 40 marbles. He loses some marbles and now has 25 left. How many marbles did he lose? (Formulate an equation and check for reasonableness.)

• 5

• 20

• 10

• 15

Samantha has 60 candies. She gives away some candies to her friends and now has 45 left. How many candies did she give away? (Write an equation and assess if it is reasonable.)

• 20

• 10

• 15

• 25

A library has 100 books. If 25 more books are added, how many books will the library have? (Create an equation and check if your answer is reasonable.)

• 125

• 100

• 150

• 75

There are 90 students in a school. If 15 more students enroll, how many students will there be in total? (Formulate an equation and verify your answer.)

• 90

• 120

• 100

• 105