Grade 5 Math: Estimating Sums & Solving Multi-Step Problems

A bakery made 120 cookies. They sold 45 cookies in the morning and 38 in the afternoon. How many cookies are left? Estimate the number of cookies left by rounding.

• 25

• 37

• 50

• 60

Sarah has 250 stickers. She gives 75 stickers to her friend and buys 40 more. How many stickers does she have now? Justify your answer using estimation.

• 250

• 215

• 200

• 180

A farmer has 150 apples. He sells 60 apples and then picks 25 more from his trees. How many apples does he have now? Check the reasonableness of your answer by rounding.

• 115

• 90

• 130

• 100

In a classroom, there are 30 students. If 12 students are absent and 5 new students join, how many students are in the classroom now? Estimate the total number of students.

• 30

• 20

• 23

• 25

A toy store had 200 toys. They sold 85 toys on Saturday and 45 toys on Sunday. How many toys are left? Use rounding to estimate the number of toys remaining.

• 50

• 80

• 60

• 70

Liam read 45 pages of a book on Monday and 38 pages on Tuesday. If the book has 150 pages, how many pages does he have left to read? Justify your solution with estimation.

• 67 pages

• 100 pages

• 50 pages

• 80 pages

A library has 500 books. If 150 books are checked out and 75 new books are added, how many books are in the library now? Estimate the total number of books.

• 425

• 400

• 350

• 500

Emma has 80 marbles. She loses 15 marbles and then finds 10 more. How many marbles does she have now? Use mental computation to check your answer.

• 75

• 70

• 85

• 60

A school organized a field trip for 120 students. If 30 students canceled their trip and 10 more students joined, how many students are going on the trip? Estimate the number of students going.

• 80 students

• 90 students

• 100 students

• 110 students

A gardener planted 200 flowers. If 50 flowers died and he planted 30 more, how many flowers does he have now? Justify your answer using estimation strategies.

• 150

• 210

• 180

• 200