I'll work through each estimation problem step by step, rounding to the nearest ten as instructed.
Problem 1: 42 + 13 + 81
- 42 rounds to 40
- 13 rounds to 10
- 81 rounds to 80
- 40 + 10 + 80 = 130
Problem 2: 27 + 54 + 69
- 27 rounds to 30
- 54 rounds to 50
- 69 rounds to 70
- 30 + 50 + 70 = 150
Problem 3: 36 + 75 + 62
- 36 rounds to 40
- 75 rounds to 80
- 62 rounds to 60
- 40 + 80 + 60 = 180
Problem 4: 88 + 93 + 53
- 88 rounds to 90
- 93 rounds to 90
- 53 rounds to 50
- 90 + 90 + 50 = 230
Problem 5: 19 + 43 + 38
- 19 rounds to 20
- 43 rounds to 40
- 38 rounds to 40
- 20 + 40 + 40 = 100
Problem 6: 66 + 25 + 88
- 66 rounds to 70
- 25 rounds to 30
- 88 rounds to 90
- 70 + 30 + 90 = 190
Problem 7: 87 + 53 + 22
- 87 rounds to 90
- 53 rounds to 50
- 22 rounds to 20
- 90 + 50 + 20 = 160
Problem 8: 38 + 11 + 48
- 38 rounds to 40
- 11 rounds to 10
- 48 rounds to 50
- 40 + 10 + 50 = 100
Problem 9: 29 + 69 + 65
- 29 rounds to 30
- 69 rounds to 70
- 65 rounds to 70
- 30 + 70 + 70 = 170
Problem 10: 78 + 80 + 59
- 78 rounds to 80
- 80 stays 80
- 59 rounds to 60
- 80 + 80 + 60 = 220
Final Answer:
1) 130
2) 150
3) 180
4) 230
5) 100
6) 190
7) 160
8) 100
9) 170
10) 220
Parent Tip: Review the logic above to help your child master the concept of estimating differences worksheet 3rd grade.
