educational
☼ Square of a number : If a number is multiplied by itself the product so obtained is called the square of that number.
e.g. Square of 9 = 9
■ Rule : In the given decimal numerals, make same number of decimal places by annexing zeros if needed. Considering these numbers without decimal places, find H.C.F. or L.C.M. as the case may be. Now, in the re…
■ Rule : Divide the given decimal fraction without the decimal point by the given counting number. Now, in the quotient, put the decimal point to give as many paces of decimal as are there in the dividend.
■ Rule : Multiply the given numbers considering them without the decimal point. 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 places…
■ Rule : Shift the decimal point to the right by as many places of decimal as is the power of 10.
e.g. Evaluate : (i) 5.4203 100 (ii) .0189 1000 (iii) .003 100…
■ Rule : In the denominator, put 1 under the decimal point and annex with it as many zeros as is the number of digits after the decimal point. Now, remove the decimal point and reduce the fraction to lowest t…
☼ Decimal Fractions : Fractions in which the denominators are powers of 10 are called decimal fractions.
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