Problem Description:
The task is to round each number in the provided list to the nearest ten. The numbers are listed in two columns, and we need to round each one individually.
Solution Approach:
To round a number to the nearest ten:
1.
Identify the tens digit (the second digit from the right).
2.
Look at the ones digit (the rightmost digit):
- If the ones digit is 5 or greater,
round up the tens digit by 1.
- If the ones digit is less than 5,
keep the tens digit as it is.
3. Replace all digits to the right of the tens digit with zeros.
Step-by-Step Solution:
#### Column 1:
1.
345:
- Ones digit = 5 → Round up.
- Rounded to nearest ten:
350.
2.
791:
- Ones digit = 1 → Keep the same.
- Rounded to nearest ten:
790.
3.
893:
- Ones digit = 3 → Keep the same.
- Rounded to nearest ten:
890.
4.
1,371:
- Ones digit = 1 → Keep the same.
- Rounded to nearest ten:
1,370.
5.
1,939:
- Ones digit = 9 → Round up.
- Rounded to nearest ten:
1,940.
6.
3,823:
- Ones digit = 3 → Keep the same.
- Rounded to nearest ten:
3,820.
7.
5,910:
- Ones digit = 0 → Keep the same.
- Rounded to nearest ten:
5,910.
8.
9,006:
- Ones digit = 6 → Round up.
- Rounded to nearest ten:
9,010.
9.
11,562:
- Ones digit = 2 → Keep the same.
- Rounded to nearest ten:
11,560.
10.
15,389:
- Ones digit = 9 → Round up.
- Rounded to nearest ten:
15,390.
#### Column 2:
11.
17,327:
- Ones digit = 7 → Round up.
- Rounded to nearest ten:
17,330.
12.
23,566:
- Ones digit = 6 → Round up.
- Rounded to nearest ten:
23,570.
13.
89,210:
- Ones digit = 0 → Keep the same.
- Rounded to nearest ten:
89,210.
14.
145,310:
- Ones digit = 0 → Keep the same.
- Rounded to nearest ten:
145,310.
15.
512,991:
- Ones digit = 1 → Keep the same.
- Rounded to nearest ten:
512,990.
16.
802,176:
- Ones digit = 6 → Round up.
- Rounded to nearest ten:
802,180.
17.
999,991:
- Ones digit = 1 → Keep the same.
- Rounded to nearest ten:
999,990.
18.
34.12:
- Ones digit = 1 → Keep the same.
- Rounded to nearest ten:
30 (since 34 rounds to 30).
19.
159.7:
- Ones digit = 9 → Round up.
- Rounded to nearest ten:
160.
20.
378.98:
- Ones digit = 8 → Round up.
- Rounded to nearest ten:
380.
Final Answer:
\[
\boxed{
\begin{array}{ll}
\text{Column 1:} & \text{Column 2:} \\
350 & 17,330 \\
790 & 23,570 \\
890 & 89,210 \\
1,370 & 145,310 \\
1,940 & 512,990 \\
3,820 & 802,180 \\
5,910 & 999,990 \\
9,010 & 30 \\
11,560 & 160 \\
15,390 & 380 \\
\end{array}
}
\]
Parent Tip: Review the logic above to help your child master the concept of rounding and place value worksheet.
