Let’s go step by step to solve each problem.
We are rounding decimals to the nearest whole number.
Rule: If the decimal part is 0.5 or more, round up. If it’s less than 0.5, round down.
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Problem 1)
First arrow points to
3.6 → already given.
3.6 is between 3 and 4. The decimal part is 0.6, which is more than 0.5 → so we round
up to
4.
Second arrow is pointing at a number between 7 and 8. Let’s count the small marks.
From 7 to 8, there are 10 small lines (each = 0.1). The arrow is on the 3rd line after 7 → that’s
7.3.
7.3 → decimal part is 0.3, which is less than 0.5 → round
down to
7.
So:
- 3.6 to the nearest one is
4
- 7.3 to the nearest one is
7
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Problem 2)
First arrow: between 4 and 5. Counting from 4: it’s on the 6th small mark →
4.6
4.6 → decimal 0.6 ≥ 0.5 → round
up to
5
Second arrow: between 6 and 7. It’s on the 4th small mark after 6 →
6.4
6.4 → decimal 0.4 < 0.5 → round
down to
6
So:
- 4.6 to the nearest one is
5
- 6.4 to the nearest one is
6
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Problem 3)
Four arrows here.
First arrow: just before 4 → on the 9th mark after 3 →
3.9
3.9 → 0.9 ≥ 0.5 → round
up to
4
Second arrow: between 5 and 6 → on the 5th mark after 5 →
5.5
5.5 → exactly halfway → rule says round
up to
6
Third arrow: between 6 and 7 → on the 2nd mark after 6 →
6.2
6.2 → 0.2 < 0.5 → round
down to
6
Fourth arrow: between 7 and 8 → on the 8th mark after 7 →
7.8
7.8 → 0.8 ≥ 0.5 → round
up to
8
So:
- 3.9 to the nearest 1 is
4
- 5.5 to the nearest 1 is
6
- 6.2 to the nearest 1 is
6
- 7.8 to the nearest 1 is
8
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Final Answer:
1)
3.6 to the nearest one is
4
7.3 to the nearest one is
7
2)
4.6 to the nearest one is
5
6.4 to the nearest one is
6
3)
3.9 to the nearest 1 is
4
5.5 to the nearest 1 is
6
6.2 to the nearest 1 is
6
7.8 to the nearest 1 is
8
Parent Tip: Review the logic above to help your child master the concept of rounding to the nearest whole number worksheet.
