To solve the problem of rounding numbers to the nearest 10, 100, and 1000, we need to follow specific rules for rounding. Here's a step-by-step explanation and solution:
Rounding Rules:
1.
Nearest 10:
- Look at the digit in the ones place.
- If it is 5 or greater, round up.
- If it is less than 5, round down.
2.
Nearest 100:
- Look at the digit in the tens place.
- If it is 5 or greater, round up.
- If it is less than 5, round down.
3.
Nearest 1000:
- Look at the digit in the hundreds place.
- If it is 5 or greater, round up.
- If it is less than 5, round down.
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Solutions:
####
Round these numbers to the nearest 10:
1.
47 → The ones digit is 7 (≥ 5), so round up:
50
2.
64 → The ones digit is 4 (< 5), so round down:
60
3.
128 → The ones digit is 8 (≥ 5), so round up:
130
4.
93 → The ones digit is 3 (< 5), so round down:
90
5.
315 → The ones digit is 5 (≥ 5), so round up:
320
6.
173 → The ones digit is 3 (< 5), so round down:
170
7.
908 → The ones digit is 8 (≥ 5), so round up:
910
8.
209 → The ones digit is 9 (≥ 5), so round up:
210
9.
167 → The ones digit is 7 (≥ 5), so round up:
170
10.
245 → The ones digit is 5 (≥ 5), so round up:
250
11.
373 → The ones digit is 3 (< 5), so round down:
370
12.
196 → The ones digit is 6 (≥ 5), so round up:
200
Answers:
1) 50, 2) 60, 3) 130, 4) 90, 5) 320, 6) 170, 7) 910, 8) 210, 9) 170, 10) 250, 11) 370, 12) 200
---
####
Round these numbers to the nearest 100:
1.
732 → The tens digit is 3 (< 5), so round down:
700
2.
569 → The tens digit is 6 (≥ 5), so round up:
600
3.
306 → The tens digit is 0 (< 5), so round down:
300
4.
817 → The tens digit is 1 (< 5), so round down:
800
5.
763 → The tens digit is 6 (≥ 5), so round up:
800
6.
284 → The tens digit is 8 (≥ 5), so round up:
300
7.
455 → The tens digit is 5 (≥ 5), so round up:
500
8.
1372 → The tens digit is 7 (≥ 5), so round up:
1400
9.
2408 → The tens digit is 0 (< 5), so round down:
2400
10.
1375 → The tens digit is 7 (≥ 5), so round up:
1400
11.
956 → The tens digit is 5 (≥ 5), so round up:
1000
12.
4347 → The tens digit is 4 (< 5), so round down:
4300
Answers:
1) 700, 2) 600, 3) 300, 4) 800, 5) 800, 6) 300, 7) 500, 8) 1400, 9) 2400, 10) 1400, 11) 1000, 12) 4300
---
####
Round these numbers to the nearest 1000:
1.
1348 → The hundreds digit is 3 (< 5), so round down:
1000
2.
5027 → The hundreds digit is 0 (< 5), so round down:
5000
3.
1608 → The hundreds digit is 6 (≥ 5), so round up:
2000
4.
827 → The hundreds digit is 0 (< 5), so round down:
1000
5.
5981 → The hundreds digit is 9 (≥ 5), so round up:
6000
6.
4389 → The hundreds digit is 3 (< 5), so round down:
4000
7.
2715 → The hundreds digit is 7 (≥ 5), so round up:
3000
8.
1595 → The hundreds digit is 5 (≥ 5), so round up:
2000
9.
6375 → The hundreds digit is 3 (< 5), so round down:
6000
10.
3811 → The hundreds digit is 8 (≥ 5), so round up:
4000
11.
375 → The hundreds digit is 0 (< 5), so round down:
1000
12.
7287 → The hundreds digit is 2 (< 5), so round down:
7000
Answers:
1) 1000, 2) 5000, 3) 2000, 4) 1000, 5) 6000, 6) 4000, 7) 3000, 8) 2000, 9) 6000, 10) 4000, 11) 1000, 12) 7000
---
Final Answer:
\[
\boxed{
\begin{array}{ll}
\text{Nearest 10:} & 50, 60, 130, 90, 320, 170, 910, 210, 170, 250, 370, 200 \\
\text{Nearest 100:} & 700, 600, 300, 800, 800, 300, 500, 1400, 2400, 1400, 1000, 4300 \\
\text{Nearest 1000:} & 1000, 5000, 2000, 1000, 6000, 4000, 3000, 2000, 6000, 4000, 1000, 7000
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of rounding 10s and 100s worksheet.
