Question 91

Simplify: $$30 \times 3 \times 0.3 \times 0.03 \times 0.003$$

Solution
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 $$30 \times 3 \times 0.3 \times 0.03 \times 0.003$$

 = $$30 \times 3 \times(\frac {3}{10}) \times(\frac{3}{100}) \times(\frac{3}{1000})$$

 =  $$\frac{3\times 3\times 3\times 3\times 3}{100000}$$

 = $$\frac{243}{100000}$$

 = 0.00243

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