Rounding To 1,2 or 3 decimal places.

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Presentation transcript:

Rounding To 1,2 or 3 decimal places

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

3.2 . . 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

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

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

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

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