Decimal Fraction Rules

Multiplication of a decimal Fraction by a Power of 10: Rule: Shift the decimal point to the right by as many places of decimal as   is the power of 10.

Multiplication of Decimal fractions:- Rule :- Multiply the given numbers considering them without the  decimal  point. Now, in the product, the decimal point is marked off to obtain as many places of decimal as is the sum of the number of decimal in the given numbers.

Dividing a Decimal fraction By a Counting Number

Rule: - Divide the given number without considering the decimal point  by the given counting   number. Now, in the quotient, put the decimal point to give as many places of decimal as are there in  the dividend.

Dividing a Decimal fraction By a Decimal Fraction

Rule: - Multiply both the dividend and the divisor by a suitable power of 10 to make divisor a whole number. Now, proceed as above.

H. C. F. & L. C. M. of Decimal fractions:- Rule :- In given numbers, make the same number of decimal places by  annexing zeros in some numbers, if necessary.  Considering these numbers as without decimal point, find H. C. F. or, L.C.M., as the case may be. Now, in the result, make off as many decimal places as are there in each of the given numbers.

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