Problem: Rounding Numbers to the Nearest Ten
The task is to round each given number to the nearest ten. Here's how to solve it step by step:
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Steps for Rounding to the Nearest Ten:
1. Identify the digit in the ones place (the digit immediately to the right of the tens place).
2. If the digit in the ones place is
5 or greater, round up the tens digit by 1.
3. If the digit in the ones place is
less than 5, keep the tens digit as it is.
4. Replace all digits to the right of the tens place with zeros (though in this case, we only need to write the rounded number).
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Solutions:
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Column I:
1.
37: The ones digit is 7 (greater than 5). Round up the tens digit (3) to 4.
Answer: 40
2.
42: The ones digit is 2 (less than 5). Keep the tens digit (4) as it is.
Answer: 40
3.
26: The ones digit is 6 (greater than 5). Round up the tens digit (2) to 3.
Answer: 30
4.
28: The ones digit is 8 (greater than 5). Round up the tens digit (2) to 3.
Answer: 30
5.
21: The ones digit is 1 (less than 5). Keep the tens digit (2) as it is.
Answer: 20
6.
59: The ones digit is 9 (greater than 5). Round up the tens digit (5) to 6.
Answer: 60
7.
62: The ones digit is 2 (less than 5). Keep the tens digit (6) as it is.
Answer: 60
8.
9: The ones digit is 9 (greater than 5). Since there is no tens digit, treat it as 0 and round up to 10.
Answer: 10
9.
83: The ones digit is 3 (less than 5). Keep the tens digit (8) as it is.
Answer: 80
10.
92: The ones digit is 2 (less than 5). Keep the tens digit (9) as it is.
Answer: 90
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Column II:
11.
32: The ones digit is 2 (less than 5). Keep the tens digit (3) as it is.
Answer: 30
12.
43: The ones digit is 3 (less than 5). Keep the tens digit (4) as it is.
Answer: 40
13.
54: The ones digit is 4 (less than 5). Keep the tens digit (5) as it is.
Answer: 50
14.
7: The ones digit is 7 (greater than 5). Since there is no tens digit, treat it as 0 and round up to 10.
Answer: 10
15.
46: The ones digit is 6 (greater than 5). Round up the tens digit (4) to 5.
Answer: 50
16.
75: The ones digit is 5 (equal to 5). Round up the tens digit (7) to 8.
Answer: 80
17.
35: The ones digit is 5 (equal to 5). Round up the tens digit (3) to 4.
Answer: 40
18.
24: The ones digit is 4 (less than 5). Keep the tens digit (2) as it is.
Answer: 20
19.
81: The ones digit is 1 (less than 5). Keep the tens digit (8) as it is.
Answer: 80
20.
93: The ones digit is 3 (less than 5). Keep the tens digit (9) as it is.
Answer: 90
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Final Answer:
\[
\boxed{
\begin{array}{ll}
1. 40 & 11. 30 \\
2. 40 & 12. 40 \\
3. 30 & 13. 50 \\
4. 30 & 14. 10 \\
5. 20 & 15. 50 \\
6. 60 & 16. 80 \\
7. 60 & 17. 40 \\
8. 10 & 18. 20 \\
9. 80 & 19. 80 \\
10. 90 & 20. 90 \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of rounding to the nearest ten worksheets.
