Let’s go through each problem step by step.
We are rounding numbers to the accuracy of the
underlined digit. That means we look at the underlined digit and decide whether to keep it or round it up, based on the digit to its right.
Rules:
- If the digit to the right is 5 or more, round up.
- If it’s less than 5, leave the underlined digit as is.
- Then change all digits to the right of the underlined digit to zero (if needed).
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1.
1,3̲11 → underlined digit is 3 (hundreds place). Look at next digit: 1 → less than 5 → keep 3 → becomes
1,300
2.
4,8̲62 → underlined digit is 8 (hundreds place). Next digit: 6 → ≥5 → round up 8 to 9 → becomes
4,900
3.
4̲12 → underlined digit is 4 (hundreds place). Next digit: 1 → <5 → keep 4 → becomes
400
4.
1,0̲42 → underlined digit is 0 (hundreds place). Next digit: 4 → <5 → keep 0 → becomes
1,000
5.
9,7̲85 → underlined digit is 7 (hundreds place). Next digit: 8 → ≥5 → round up 7 to 8 → becomes
9,800
6.
1,0̲32 → underlined digit is 0 (hundreds place). Next digit: 3 → <5 → keep 0 → becomes
1,000
7.
5̲76 → underlined digit is 5 (hundreds place). Next digit: 7 → ≥5 → round up 5 to 6 → becomes
600
8.
6,3̲50 → underlined digit is 3 (hundreds place). Next digit: 5 → ≥5 → round up 3 to 4 → becomes
6,400
9.
6,8̲95 → underlined digit is 8 (hundreds place). Next digit: 9 → ≥5 → round up 8 to 9 → becomes
6,900
10.
3,3̲28 → underlined digit is 3 (hundreds place). Next digit: 2 → <5 → keep 3 → becomes
3,300
11.
7̲06 → underlined digit is 7 (hundreds place). Next digit: 0 → <5 → keep 7 → becomes
700
12.
9,5̲21 → underlined digit is 5 (hundreds place). Next digit: 2 → <5 → keep 5 → becomes
9,500
13.
5,4̲69 → underlined digit is 4 (hundreds place). Next digit: 6 → ≥5 → round up 4 to 5 → becomes
5,500
14.
9,1̲82 → underlined digit is 1 (hundreds place). Next digit: 8 → ≥5 → round up 1 to 2 → becomes
9,200
15.
9,5̲79 → underlined digit is 5 (hundreds place). Next digit: 7 → ≥5 → round up 5 to 6 → becomes
9,600
16.
5,9̲14 → underlined digit is 9 (hundreds place). Next digit: 1 → <5 → keep 9 → becomes
5,900
17.
6,2̲87 → underlined digit is 2 (hundreds place). Next digit: 8 → ≥5 → round up 2 to 3 → becomes
6,300
18.
1,8̲73 → underlined digit is 8 (hundreds place). Next digit: 7 → ≥5 → round up 8 to 9 → becomes
1,900
19.
9̲23 → underlined digit is 9 (hundreds place). Next digit: 2 → <5 → keep 9 → becomes
900
20.
6,9̲23 → underlined digit is 9 (hundreds place). Next digit: 2 → <5 → keep 9 → becomes
6,900
21.
1̲85 → underlined digit is 1 (hundreds place). Next digit: 8 → ≥5 → round up 1 to 2 → becomes
200
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Final Answer:
1. 1,300
2. 4,900
3. 400
4. 1,000
5. 9,800
6. 1,000
7. 600
8. 6,400
9. 6,900
10. 3,300
11. 700
12. 9,500
13. 5,500
14. 9,200
15. 9,600
16. 5,900
17. 6,300
18. 1,900
19. 900
20. 6,900
21. 200
Parent Tip: Review the logic above to help your child master the concept of rounding to the nearest tens and hundreds worksheet.
