Question

$0.4\times 0.9=\_\_\_$

Answer 1

When we remove a decimal from a given number then the number of zeros is added to the denominator

$$\begin{gathered} =0.4\times 0.9 \\ =\frac{4}{10}\times \frac{9}{10} \\ =\frac{36}{100} \\ =0.36 \end{gathered}$$

Hence, $0.4\times 0.9=0.36$