Estimating and Reasoning in Multistep Math Problems

Lily has 24 apples. She gives 8 apples to her friend and then buys 15 more. How many apples does she have now? Check if your answer is reasonable by estimating.

• 16

• 24

• 40

• 31

A baker made 120 cookies. He sold 45 cookies in the morning and 30 in the afternoon. How many cookies does he have left? Use estimation to check your work.

• 30

• 45

• 75

• 60

Tom has 3 packs of crayons. Each pack contains 12 crayons. If he gives away 10 crayons, how many does he have left? Estimate to see if your answer makes sense.

• 15

• 22

• 26

• 30

Sarah read 45 pages of a book on Monday and 30 pages on Tuesday. If the book has 150 pages, how many pages does she have left to read? Check for reasonableness in your answer.

• 100 pages

• 60 pages

• 75 pages

• 90 pages

A toy store has 150 toys. They sold 75 toys on Saturday and 40 toys on Sunday. How many toys are left? Use estimation to verify your answer.

• 50

• 60

• 35

• 25

In a garden, there are 60 flowers. If 15 flowers bloom and 10 wilt, how many flowers are still healthy? Estimate to check if your answer is reasonable.

• 45

• 50

• 40

• 55

A school has 250 students. If 50 students are absent and 30 new students enroll, how many students are there now? Check your answer for reasonableness.

• 200

• 250

• 280

• 230

Emma has 5 boxes of chocolates. Each box contains 20 chocolates. If she eats 15 chocolates, how many chocolates does she have left? Use estimation to see if your answer is reasonable.

• 75

• 100

• 85

• 90

A farmer has 200 apples. He sells 50 apples and then picks 30 more from his trees. How many apples does he have now? Check for reasonableness in your answer.

• 200

• 180

• 150

• 210

A library has 500 books. If 120 books are checked out and 50 new books are added, how many books are in the library now? Use estimation to verify your answer.

• 430

• 500

• 450

• 400