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Decimal fractions are commonly expressed without a denominator, the decimal separator being inserted into the numerator (with leading zeros added if needed), at the position from the right corresponding to the power of ten of the denominator in math.
e.g., 8/10, 83/100, 83/1000, and 8/10000 are expressed as: 0.8, 0.83, 0.083, and 0.0008.
Rounding Decimals
Round off to the nearest tenths
Round off 12.302 to the nearest tenths.
i. Determine the place value you want to round off
(the rounding digit) and circle it.
ii. Look at the digit just to the right (behind) and underline it.

Note:
If the underlined digit is less than 5, do not change the rounding digit but drop
all digits to the right of it.
If that digit is greater than or equal to five, add one to the rounding digit and
drop all digits to the right of it. (See the example as shown below)

Example 2:
Round off to the nearest hundredths
Round off 34. 786 to the nearest hundredths

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