Solve with due regard to significant figures.
(i) 46.7 -10.04
(ii) `(3.0xx10^(-8))+(4.5xx10^(-6))`

Explanation

(i) 46.7 - 10.04
Here 46.7 has one decimal place, and 10.04 has two decimal places.
`therefore 46.7 - 10.4 = 36.66 `
The result should have only one decimal place. The result is 36.7
(ii) `3.0xx10^(-8) + 4.5 xx 10^(-6)`
`=0.03xx10^(-6) ` have two decimal place and `0.03 xx 10^(-6)` can have two decimal places. This result should be rounded off to one decimal place.
`therefore (3.0xx10^(-8) ) + (4.5 xx 10^(-6)) = 4.5 xx 10^(-6))`