Question

Evaluate:
viii) $0.5\times 0.06\times 0.007$

Answer 1

Step: Evaluate
Given $0.5\times 0.06\times 0.007$
$\Rightarrow 0.5\times 0.06$
Ignore the decimals for now,
$\Rightarrow 5\times 6$
$=30$
$\Rightarrow 30\times 0.007$
$\begin{array}{c}30\\ \underset{–}{\times 7}\\ \underset{–}{210}\end{array}$
$0.5$ has $1$ decimal place, $0.06$ has $2$ decimal places and $0.007$ has $3$ decimal places. So, their product will have $1+2+3=6$ decimal places.
$\therefore 0.5\times 0.06\times 0.007=0.00021$