Question

Expand: $200.003$.

Answer 1

$200.003=2\times 100+0\times 10+0\times 1+0\times \frac{1}{10}+0\times \frac{1}{100}+3\times \frac{1}{1000}$

$=2\times 100+3\times \frac{1}{1000}$

$=2\times {10}^2+3\times {10}^{-3}$