Mathematics: Place Value - Rounding to Tens

Level: Standard 1

Place Value

Rounding to Tens

Rounded numbers are only approximates. They are not exact values.

When rounding to the nearest 10, if the last digit ends in 1, 2, 3 or 4 round to the number that is smaller than the number given and end with 0.

Examples:

71~ 70

42~ 40

33~ 30

64~ 60

If the last digit ends in 5, 6, 7, 8 or 9 round to the next number bigger than the given number and end in 0.

Examples:

75~ 80

46~ 50

37~ 40

68~ 70

79~ 80

Round the following numbers to the nearest 10

1)      23~ 20

2)      65~ 70

3)      55~ 60

4)      45~ 50

5)      51~ 50

6)      21~ 20

7)      48~ 50

8)      39~ 40

9)      22~ 20

10)   25~ 30