Given expression is, 0.004 x 0.04 x 0.4 x 0.0004The multiplication value without decimal point = 4 x 4 x 4 x 4 = 256Sum of the number of decimal places in the given numbers = 3 + 2 + 1 + 4 = 10Now, in the product, the decimal point is marked off to obtain as many places of decimal.Then the answer is 0.0000000256.
Given expression is, 0.008 x 0.3The multiplication value without decimal point = 8 x 3 = 24Sum of the number of decimal places in the given numbers = 3 + 1 = 4Now, in the product, the decimal point is marked off to obtain as many places of decimal.Then the answer is 0.0024.
Let X and Y are given fractions.Given that, fraction X is thrice the fraction Y;i.e., X = 3Y ...(1)And their product = X x Y = 25/12Sub. eqn (1) in above,(3Y)x(Y) = 25/123(Y²) = 25/12(Y²) = 25/36Y = 5/6Hence the required fraction is 5/6.
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