1. Rounding
To 1,2 or 3 decimal places

2. 1.7 . . 1.682 1.682 Round to 1 decimal place U 1 6 8 2
1/10
1/100
1/1000
thousandths
units .
tenths
hundredths 1 6 8 2
hundredths
decimal
point
1) Draw a line to the right of the 1st decimal place
2) Is the number on the right
5 or bigger?
3) YES, so round up
1.682
1.7

3. 3.2 . . 3.257 3.257 Round to 1 decimal place U 3 2 5 7
1/10
1/100
1/1000
thousandths
units .
tenths
hundredths 3 2 5 7
hundredths
decimal
point
1) Draw a line to the right of the 1st decimal place
2) Is the number on the right
5 or bigger?
3) NO, so round down
3.257
3.2

4. Round to 2 decimal places
1.687 . U
1/10
1/100
1/1000
thousandths
units .
tenths
hundredths 1 6 8 7
hundredths
decimal
point
1) Draw a line to the right of the 2nd decimal place
2) Is the number on the right
5 or bigger?
3) YES, so round up
1.687
1.69

5. Round to 2 decimal places
1.682 . U
1/10
1/100
1/1000
thousandths
units .
tenths
hundredths 1 6 8 2
hundredths
decimal
point
1) Draw a line to the right of the 2nd decimal place
2) Is the number on the right
5 or bigger?
3) No, so round down
1.682
1.68

6. Round to 3 decimal places
7.5872
Tens of thousandths . U
1/10
1/100
1/1000
1/10000
thousandths
units .
tenths
hundredths 7 5 8 7 2
hundredths
decimal
point
1) Draw a line to the right of the 3rd decimal place
2) Is the number on the right
5 or bigger?
3) NO, so round down
7.5872
7.587

7. Round to 3 decimal places
8.3452
Tens of thousandths . U
1/10
1/100
1/1000
1/10000
thousandths
units .
tenths
hundredths 1 6 8 7
hundredths
decimal
point
1) Draw a line to the right of the 3rd decimal place
2) Is the number on the right
5 or bigger?
3) YES, so round up
8.3459
8.346