High School

1. Round each of the following numbers to the nearest ten.

a. 13
b. 25
c. 76
d. 51
e. 76
f. 46
g. 57
h. 69
i. 91
j. 93

2. To what numbers could the following be rounded when rounding to the nearest ten?

a. 218
b. 632
c. 994
d. 5085
e. 867
f. 529
g. 188
h. 2527
i. 3975
j. 1828

Answer :

To round numbers to the nearest ten, you look at the ones digit. If the ones digit is 5 or higher, you round up. If it is 4 or lower, you round down. Here are the answers to the given numbers:

  1. Round each of the following numbers to the nearest ten:

    a. 13

    The ones digit is 3. Since 3 is less than 5, round down.

    **Rounded to nearest ten**: 10

    b. 25

    The ones digit is 5. Since 5 is equal to 5, round up.

    **Rounded to nearest ten**: 30

    c. 76

    The ones digit is 6. Since 6 is greater than 5, round up.

    **Rounded to nearest ten**: 80

    d. 51

    The ones digit is 1. Since 1 is less than 5, round down.

    **Rounded to nearest ten**: 50

    e. 76

    The ones digit is 6. Since 6 is greater than 5, round up.

    **Rounded to nearest ten**: 80

    f. 46

    The ones digit is 6. Since 6 is greater than 5, round up.

    **Rounded to nearest ten**: 50

    g. 57

    The ones digit is 7. Since 7 is greater than 5, round up.

    **Rounded to nearest ten**: 60

    h. 69

    The ones digit is 9. Since 9 is greater than 5, round up.

    **Rounded to nearest ten**: 70

    i. 91

    The ones digit is 1. Since 1 is less than 5, round down.

    **Rounded to nearest ten**: 90

    j. 93

    The ones digit is 2. Since 2 is less than 5, round down.

    **Rounded to nearest ten**: 90

  2. While rounding to the nearest ten, what numbers could be rounded to?

    a. 218: Between 210 and 220

    b. 632: Between 630 and 640

    c. 994: Between 990 and 1000

    d. 5085: Between 5080 and 5090

    e. 867: Between 860 and 870

    f. 529: Between 520 and 530

    g. 188: Between 180 and 190

    h. 2527: Between 2520 and 2530

    i. 3975: Between 3970 and 3980

    j. 1828: Between 1820 and 1830

When rounding, always remember to check the ones digit to decide whether to round the tens digit up or keep it the same.

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