Grade 5 Math: Estimating Sums and Differences Challenge

1. Sarah has 125 apples. She gives 37 apples to her friends. How many apples does she have left? Estimate the difference first.

• 88

• 75

• 100

• 90

2. A baker made 240 cookies. If he sells 85 cookies, how many cookies does he have remaining? Use subtraction to find the answer.

• 145

• 170

• 155

• 200

3. A school has 450 students. If 120 students are absent, how many students are present? Estimate the number of present students.

• 250

• 300

• 400

• 330

4. Tom has 5 packs of stickers. Each pack contains 12 stickers. How many stickers does Tom have in total? Use multiplication to find the answer.

• 36 stickers

• 60 stickers

• 72 stickers

• 48 stickers

5. A farmer has 300 oranges. He sells them in bags of 15 oranges each. How many bags can he fill? Use division to solve the problem.

• 20

• 10

• 25

• 15

6. Lisa read 45 pages of a book on Monday and 38 pages on Tuesday. How many pages did she read in total? Estimate the sum first.

• 90

• 75

• 83

• 100

7. A toy store had 150 toys. After a sale, they had 75 toys left. How many toys were sold? Use subtraction to find the answer.

• 100

• 50

• 25

• 75

8. There are 8 rows of chairs in a hall, with 9 chairs in each row. How many chairs are there in total? Use multiplication to solve.

• 81

• 72

• 64

• 90

9. A library has 1,200 books. If 300 books are checked out, how many books remain in the library? Estimate the difference first.

• 800

• 1,000

• 1,200

• 900

10. A pizza is cut into 8 equal slices. If 3 slices are eaten, how many slices are left? Use subtraction to find the answer.

• 4

• 6

• 7

• 5