Let’s solve each problem step by step. We’re rounding 2-digit numbers to the nearest 10.
Rule for rounding to the nearest 10:
- Look at the
ones digit (the last digit).
- If it’s
5 or more, round
up.
- If it’s
4 or less, round
down.
---
Let’s go one by one:
1.
82 → ones digit is 2 → less than 5 → round down →
80
2.
84 → ones digit is 4 → less than 5 → round down →
80
3.
92 → ones digit is 2 → less than 5 → round down →
90
4.
51 → ones digit is 1 → less than 5 → round down →
50
5.
13 → ones digit is 3 → less than 5 → round down →
10
6.
70 → already ends in 0 → stays
70
7.
66 → ones digit is 6 → 5 or more → round up →
70
8.
97 → ones digit is 7 → 5 or more → round up →
100
9.
87 → ones digit is 7 → 5 or more → round up →
90
10.
29 → ones digit is 9 → 5 or more → round up →
30
11.
21 → ones digit is 1 → less than 5 → round down →
20
12.
78 → ones digit is 8 → 5 or more → round up →
80
13.
28 → ones digit is 8 → 5 or more → round up →
30
14.
36 → ones digit is 6 → 5 or more → round up →
40
15.
57 → ones digit is 7 → 5 or more → round up →
60
16.
24 → ones digit is 4 → less than 5 → round down →
20
17.
47 → ones digit is 7 → 5 or more → round up →
50
18.
20 → already ends in 0 → stays
20
19.
53 → ones digit is 3 → less than 5 → round down →
50
20.
95 → ones digit is 5 → 5 or more → round up →
100
21.
41 → ones digit is 1 → less than 5 → round down →
40
---
Final Answer:
1. 80
2. 80
3. 90
4. 50
5. 10
6. 70
7. 70
8. 100
9. 90
10. 30
11. 20
12. 80
13. 30
14. 40
15. 60
16. 20
17. 50
18. 20
19. 50
20. 100
21. 40
Parent Tip: Review the logic above to help your child master the concept of rounding to the nearest tens worksheet.
