Grade 3 Math: Estimation & Operations Challenge

Lily has 24 apples. She gives 8 apples to her friend. How many apples does she have left? Use estimation to check your answer.

• 20

• 16

• 12

• 10

A farmer has 15 cows and buys 9 more. How many cows does he have now? Identify the operation needed to solve this problem.

• 18

• 24

• 20

• 30

There are 36 students in a class. If they are divided into groups of 4, how many groups will there be? Use estimation to help with your calculation.

• 8

• 9

• 10

• 7

Tom has 50 marbles. He loses 12 marbles while playing. How many marbles does he have now? What operation do you need to use?

• 62

• 25

• 40

• 38

A box contains 18 chocolates. If each child gets 3 chocolates, how many children can receive chocolates? Identify the operation needed.

• 6

• 4

• 7

• 5

Sarah read 45 pages of a book. If she reads 15 pages each day, how many days will it take her to finish the book? Use estimation to check your answer.

• 4 days

• 5 days

• 2 days

• 3 days

A store has 120 toys. If they sell 45 toys, how many toys are left in the store? What operation do you need to use?

• 85

• 90

• 65

• 75

There are 5 packs of stickers, and each pack has 10 stickers. How many stickers are there in total? Identify the operation needed to find the answer.

• 100

• 60

• 40

• 50

A baker made 72 cookies and packed them into boxes of 6. How many boxes did he use? Use estimation to help with your calculation.

• 12

• 8

• 10

• 14

Emma has 30 balloons. She gives 10 balloons to her friends and then buys 5 more. How many balloons does she have now? What operations do you need to use?

• 25

• 20

• 15

• 35