Problem Description:
The task involves rounding off numbers to the nearest ten, hundred, and thousand. The worksheet provides a series of numbers that need to be rounded according to the specified rules.
Solution Approach:
1.
Rounding to the Nearest Ten:
- Look at the digit in the ones place.
- If it is 5 or greater, round up by increasing the tens digit by 1.
- If it is less than 5, round down by keeping the tens digit the same.
- Replace all digits to the right of the tens place with zeros.
2.
Rounding to the Nearest Hundred:
- Look at the digit in the tens place.
- If it is 5 or greater, round up by increasing the hundreds digit by 1.
- If it is less than 5, round down by keeping the hundreds digit the same.
- Replace all digits to the right of the hundreds place with zeros.
3.
Rounding to the Nearest Thousand:
- Look at the digit in the hundreds place.
- If it is 5 or greater, round up by increasing the thousands digit by 1.
- If it is less than 5, round down by keeping the thousands digit the same.
- Replace all digits to the right of the thousands place with zeros.
Step-by-Step Solution:
#### Part 1: Round off to the nearest ten
1.
162,871:
- Ones digit = 1 (less than 5)
- Round down: 162,870
2.
65,444:
- Ones digit = 4 (less than 5)
- Round down: 65,440
3.
30,762:
- Ones digit = 2 (less than 5)
- Round down: 30,760
4.
276,749:
- Ones digit = 9 (5 or greater)
- Round up: 276,750
5.
11,724:
- Ones digit = 4 (less than 5)
- Round down: 11,720
6.
600,566:
- Ones digit = 6 (5 or greater)
- Round up: 600,570
#### Part 2: Round off to the nearest hundred
7.
342,563:
- Tens digit = 6 (5 or greater)
- Round up: 342,600
8.
87,991:
- Tens digit = 9 (5 or greater)
- Round up: 88,000
9.
653,683:
- Tens digit = 8 (5 or greater)
- Round up: 653,700
10.
74,127:
- Tens digit = 2 (less than 5)
- Round down: 74,100
11.
100,110:
- Tens digit = 1 (less than 5)
- Round down: 100,100
12.
72,389:
- Tens digit = 8 (5 or greater)
- Round up: 72,400
#### Part 3: Round off to the nearest thousand
13.
541,630:
- Hundreds digit = 6 (5 or greater)
- Round up: 542,000
14.
81,237:
- Hundreds digit = 2 (less than 5)
- Round down: 81,000
15.
233,710:
- Hundreds digit = 7 (5 or greater)
- Round up: 234,000
16.
44,298:
- Hundreds digit = 2 (less than 5)
- Round down: 44,000
17.
99,299:
- Hundreds digit = 2 (less than 5)
- Round down: 99,000
18.
712,777:
- Hundreds digit = 7 (5 or greater)
- Round up: 713,000
Final Answer:
\[
\boxed{
\begin{array}{ll}
1. & 162,870 \\
2. & 65,440 \\
3. & 30,760 \\
4. & 276,750 \\
5. & 11,720 \\
6. & 600,570 \\
7. & 342,600 \\
8. & 88,000 \\
9. & 653,700 \\
10. & 74,100 \\
11. & 100,100 \\
12. & 72,400 \\
13. & 542,000 \\
14. & 81,000 \\
15. & 234,000 \\
16. & 44,000 \\
17. & 99,000 \\
18. & 713,000 \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of rounding off numbers worksheet.
