6th Grade Equation Challenges: Inverse Operations & Checks

Maria has 24 apples. She gives some to her friend and has 10 left. How many apples did she give away?

• 18

• 14

• 12

• 16

A book costs $15. If you buy 3 books, how much do you spend in total? Check your solution by dividing the total by the price of one book.

• $60

• $45

• $15

• $30

Tom has twice as many marbles as Jerry. If Jerry has 12 marbles, how many marbles does Tom have?

• 12

• 24

• 30

• 18

A rectangle has a perimeter of 36 cm. If the length is 10 cm, what is the width? Use inverse operations to find your answer.

• 6 cm

• 8 cm

• 10 cm

• 12 cm

Samantha scored 85 points on her math test. If she answered 5 questions wrong, how many questions were on the test?

• 30

• 15

• 25

• 20

A store sells pencils for $2 each. If you spend $10, how many pencils did you buy? Verify your answer by multiplying the number of pencils by the price.

• 10

• 7

• 5

• 3

Liam has 50 stickers. He gives away some and now has 30 left. How many stickers did he give away? Check your solution by adding the number of stickers left to the number given away.

• 20

• 15

• 10

• 25

A farmer has 100 eggs. He sells some and has 40 eggs remaining. How many eggs did he sell? Use inverse operations to find the answer.

• 80

• 50

• 60

• 70

The sum of two numbers is 50. If one number is 20, what is the other number? Check your solution by adding the two numbers together.

• 40

• 10

• 25

• 30

A class has 30 students. If 12 are boys, how many are girls? Use inverse operations to check your answer.

• 10

• 15

• 20

• 18