Grade 5 Math: Check Reasonableness & Interpret Solutions

A bakery made 120 cookies. If they sold 75 cookies, how many cookies are left? Check if your answer makes sense by estimating the total before and after sales.

• 45

• 30

• 60

• 90

Sarah has 45 marbles. She gives 18 marbles to her friend. How many marbles does Sarah have now? Interpret your answer: Is it reasonable for her to have a negative number of marbles?

• 27

• 45

• 36

• 18

A farmer has 200 apples. He packs them into boxes of 25 apples each. How many boxes can he fill? Check for reasonableness by estimating how many boxes he could fill with 100 apples.

• 4

• 8

• 10

• 6

Tom read 30 pages of a book on Monday and 45 pages on Tuesday. How many pages did he read in total? Is your answer reasonable compared to the total number of pages in the book?

• 75 pages

• 90 pages

• 60 pages

• 50 pages

A toy store had 150 toys. They received a shipment of 50 more toys but sold 80 toys. How many toys are left in the store? Check if your final answer is reasonable by estimating the toys before and after sales.

• 100

• 150

• 120

• 130

Lisa has 60 stickers. She wants to share them equally among 4 friends. How many stickers will each friend get? Interpret your solution: Does it make sense for each friend to get a whole number of stickers?

• 10

• 20

• 25

• 15

A school has 500 students. If 125 students are absent on a given day, how many students are present? Check for reasonableness by estimating the number of students who should be present.

• 450

• 375

• 400

• 300

A gardener planted 120 flowers in 6 rows. How many flowers are in each row? Check if your answer is reasonable by estimating how many flowers could fit in a row if there were fewer rows.

• 20 flowers per row

• 15 flowers per row

• 25 flowers per row

• 30 flowers per row

A library has 1,200 books. If 300 books are checked out, how many books remain in the library? Interpret your answer: Is it reasonable to think the library could have a negative number of books?

• 900

• 1,200

• 300

• 600

A pizza shop made 80 pizzas. If they sold 45 pizzas and then made 20 more, how many pizzas do they have now? Check for reasonableness by estimating the number of pizzas before and after sales.

• 70

• 55

• 25

• 40