Question

Simplify:

$0.005\times {10}^2-5\times {10}^{-1}$ [4 MARKS]

Answer 1

Concept : 1 Mark
Application : 1 Mark
Calculation : 2 Marks

It's easy to subtract powers when we convert them into normal form.

$0.005\times {10}^2=0.5$ (move the decimal point 2 places to the right)

$5\times {10}^{-1}=0.5$ (move the decimal point 1 place to the left)

Now,

$0.005\times {10}^2-5\times {10}^{-1}$

$=0.5-0.5$

$=0$