find the products i 2 61 x 1 3 ii 1693, Decimal Fractions, General Mathematics

Question:Find the products:
(i) 2.61 x 1.3
(ii) 2.1693 x 1.4
(iii) .4 x .04 x .004 x 40

Answer (i) 261 x 13 = 3393 
The sum of decimal places of given numbers = (2 + 1) = 3
`:.` 2.61 x 1.3 = 3.393

(ii)  21693 x 14 = 303702
Sum of the decimal places =(4 + 1) =5
`:.` 2.1693 x 1.4 = 3.03702

(iii)  4 x 4 x 4 x 40 = 2560
Sum of the decimal places =(1 + 2 +3) =5
`:.`  .4 x .04 x .004 x 40 =.002560

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+ ExplanationNot ModeratedMultiplication 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.

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Find the products: (i) 2.61 x 1.3 (ii) 2.1693 x 1.4 (iii) .4 x .04 x .004 x 40

Question:Find the products: (i) 2.61 x 1.3 (ii) 2.1693 x 1.4 (iii) .4 x .04 x .004 x 40