Estimating and Reasoning in Multi-Step Math Challenges

Lily has 24 apples. She gives 8 apples to her friend and then buys 15 more. How many apples does she have now? Estimate your answer and check if it makes sense.

• 16

• 24

• 40

• 31

A baker made 120 cookies. He packed them into boxes of 10 cookies each. If he sold 5 boxes, how many cookies does he have left? Estimate and verify your solution.

• 60 cookies

• 50 cookies

• 70 cookies

• 80 cookies

Tom read 45 pages of a book on Monday and 30 pages on Tuesday. If he plans to read 25 pages on Wednesday, how many pages will he have read in total? Estimate and check for reasonableness.

• 90 pages

• 85 pages

• 100 pages

• 70 pages

A farmer has 150 carrots. He sells 40 carrots at the market and then plants 60 more. How many carrots does he have now? Estimate your answer and check if it is reasonable.

• 90

• 100

• 170

• 210

Sarah has 3 packs of crayons. Each pack contains 12 crayons. If she gives away 10 crayons, how many does she have left? Estimate and verify your answer.

• 26

• 15

• 30

• 22

In a classroom, there are 5 tables with 6 chairs each. If 10 chairs are broken, how many chairs are still usable? Estimate your answer and check for reasonableness.

• 20

• 25

• 30

• 15

A toy store has 200 toys. If they sell 75 toys in one week and receive a shipment of 50 new toys, how many toys do they have now? Estimate and check if your answer makes sense.

• 200

• 150

• 175

• 125

A library has 300 books. If 50 books are checked out and 20 new books are added, how many books are in the library now? Estimate your answer and check for reasonableness.

• 250

• 300

• 270

• 320

Emma has 4 boxes of chocolates. Each box contains 15 chocolates. If she eats 10 chocolates, how many chocolates does she have left? Estimate and verify your solution.

• 70

• 50

• 60

• 40

A school has 250 students. If 30 students are absent and 20 new students enroll, how many students are currently at the school? Estimate your answer and check if it is reasonable.

• 250

• 220

• 240

• 210