Question

Evaluate :
iii) $0.3\times (0.5{)}^2$

Answer 1

Step: Evaluate
Given: $0.3\times (0.5{)}^2$
$\Rightarrow (0.5{)}^2$
$\Rightarrow 0.5\times 0.5$
$=5\times 5$
$=25$
$\Rightarrow 25\times 0.3$
$\begin{array}{c}25\\ \underset{–}{\times 3}\\ \underset{–}{75}\end{array}$
$0.3$ has $1$ decimal place and $0.5$ has $1$ decimal place but is multiplied twice. So, their product will have $1+1+1=3$ decimal places.
$\therefore 0.3\times (0.5{)}^2=0.075$