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How to round a decimal number
to the nearest whole number

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First look at the value of the digit in
the tenths column
4.7

Has 7 tenths
First look at the value of the digit in
the tenths column
4.7

Has 7 tenths

5.58

Has 5 tenths
First look at the value of the digit in
the tenths column
4.7

Has 7 tenths

5.58

Has 5 tenths

3.276

Has 2 tenths
First look at the value of the digit in
the tenths column
4.7

Has 7 tenths

5.58

Has 5 tenths

3.276

Has 2 tenths

4.3

Has 3 tenths
You round down to the nearest whole
number if the tenths digit is 0,1,2,3 or 4.
3.2 is rounded down to 3
You round down to the nearest whole
number if the tenths digit is 0,1,2,3 or 4.
3.2 is rounded down to 3
4.32 is rounded down to 4
You round down to the nearest whole
number if the tenths digit is 0,1,2,3 or 4.
3.2 is rounded down to 3
4.32 is rounded down to 4
17.158 is rounded down to 17
You round down to the nearest whole
number if the tenths digit is 0,1,2,3 or 4.
3.2 is rounded down to 3
4.32 is rounded down to 4
17.158 is rounded down to 17
120.06 is rounded down to 120
You round down to the nearest whole
number if the tenths digit is 0,1,2,3 or 4.
3.2 is rounded down to 3
4.32 is rounded down to 4
17.158 is rounded down to 17
120.06 is rounded down to 120
45.4 is rounded down to 45
You round up to the nearest whole
number if the tenths digit is 5,6,7,8 or 9.
4.7 is rounded up to 5
You round up to the nearest whole
number if the tenths digit is 5,6,7,8 or 9.
4.7 is rounded up to 5
5.58 is rounded up to 6
You round up to the nearest whole
number if the tenths digit is 5,6,7,8 or 9.
4.7 is rounded up to 5
5.58 is rounded up to 6
17.872 is rounded up to 18
You round up to the nearest whole
number if the tenths digit is 5,6,7,8 or 9.
4.7 is rounded up to 5
5.58 is rounded up to 6
17.872 is rounded up to 18
125.92 is rounded up to 126
You round up to the nearest whole
number if the tenths digit is 5,6,7,8 or 9.
4.7 is rounded up to 5
5.58 is rounded up to 6
17.872 is rounded up to 18
125.92 is rounded up to 126
46.6 is rounded up to 47
Watch out for numbers which have 9
in the units column.
e.g. 9.57
If you are rounding up, you will make 10 units.
This makes 1 ten, so you have to round to the
next ten (in this case to 10).
Watch out for numbers which have 9
in the units column.
e.g. 9.57
If you are rounding up, you will make 10 units.
This makes 1 ten, so you have to round to the
next ten (in this case to 10).
For the same reason, 29.87 becomes 30
Watch out for numbers which have 9
in the units column.
e.g. 9.57
If you are rounding up, you will make 10 units.
This makes 1 ten, so you have to round to the
next ten (in this case to 10).
For the same reason, 29.87 becomes 30
19.75 becomes 20
Watch out for numbers which have 9
in the units column.
e.g. 9.57
If you are rounding up, you will make 10 units.
This makes 1 ten, so you have to round to the
next ten (in this case to 10).
For the same reason, 29.87 becomes 30
19.75 becomes 20
And 459.68 becomes 460
That’s it for now......

For more help with your maths, try
my book:
mastering multiplication tables
on amazon.com

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Rounding to a Whole Number

  • 1. How to round a decimal number to the nearest whole number For more maths help & free games related to this, visit: www.makemymathsbetter.com
  • 2. First look at the value of the digit in the tenths column 4.7 Has 7 tenths
  • 3. First look at the value of the digit in the tenths column 4.7 Has 7 tenths 5.58 Has 5 tenths
  • 4. First look at the value of the digit in the tenths column 4.7 Has 7 tenths 5.58 Has 5 tenths 3.276 Has 2 tenths
  • 5. First look at the value of the digit in the tenths column 4.7 Has 7 tenths 5.58 Has 5 tenths 3.276 Has 2 tenths 4.3 Has 3 tenths
  • 6. You round down to the nearest whole number if the tenths digit is 0,1,2,3 or 4. 3.2 is rounded down to 3
  • 7. You round down to the nearest whole number if the tenths digit is 0,1,2,3 or 4. 3.2 is rounded down to 3 4.32 is rounded down to 4
  • 8. You round down to the nearest whole number if the tenths digit is 0,1,2,3 or 4. 3.2 is rounded down to 3 4.32 is rounded down to 4 17.158 is rounded down to 17
  • 9. You round down to the nearest whole number if the tenths digit is 0,1,2,3 or 4. 3.2 is rounded down to 3 4.32 is rounded down to 4 17.158 is rounded down to 17 120.06 is rounded down to 120
  • 10. You round down to the nearest whole number if the tenths digit is 0,1,2,3 or 4. 3.2 is rounded down to 3 4.32 is rounded down to 4 17.158 is rounded down to 17 120.06 is rounded down to 120 45.4 is rounded down to 45
  • 11. You round up to the nearest whole number if the tenths digit is 5,6,7,8 or 9. 4.7 is rounded up to 5
  • 12. You round up to the nearest whole number if the tenths digit is 5,6,7,8 or 9. 4.7 is rounded up to 5 5.58 is rounded up to 6
  • 13. You round up to the nearest whole number if the tenths digit is 5,6,7,8 or 9. 4.7 is rounded up to 5 5.58 is rounded up to 6 17.872 is rounded up to 18
  • 14. You round up to the nearest whole number if the tenths digit is 5,6,7,8 or 9. 4.7 is rounded up to 5 5.58 is rounded up to 6 17.872 is rounded up to 18 125.92 is rounded up to 126
  • 15. You round up to the nearest whole number if the tenths digit is 5,6,7,8 or 9. 4.7 is rounded up to 5 5.58 is rounded up to 6 17.872 is rounded up to 18 125.92 is rounded up to 126 46.6 is rounded up to 47
  • 16. Watch out for numbers which have 9 in the units column. e.g. 9.57 If you are rounding up, you will make 10 units. This makes 1 ten, so you have to round to the next ten (in this case to 10).
  • 17. Watch out for numbers which have 9 in the units column. e.g. 9.57 If you are rounding up, you will make 10 units. This makes 1 ten, so you have to round to the next ten (in this case to 10). For the same reason, 29.87 becomes 30
  • 18. Watch out for numbers which have 9 in the units column. e.g. 9.57 If you are rounding up, you will make 10 units. This makes 1 ten, so you have to round to the next ten (in this case to 10). For the same reason, 29.87 becomes 30 19.75 becomes 20
  • 19. Watch out for numbers which have 9 in the units column. e.g. 9.57 If you are rounding up, you will make 10 units. This makes 1 ten, so you have to round to the next ten (in this case to 10). For the same reason, 29.87 becomes 30 19.75 becomes 20 And 459.68 becomes 460
  • 20. That’s it for now...... For more help with your maths, try my book: mastering multiplication tables on amazon.com