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Solve with due regard to significant figures. (i) 46.7 - 10.4 = "" (ii) (3.0 xx 10^(-8)) + (4.5 xx 10^(-6)) = |
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Answer» Solution :(i) `46.7 - 10.04` Here 46.7 has one decimal PLACE, and 10.04 has TWO decimal places. `THEREFORE 46.7 - 10.04 = 36.66` The result should have only one decimal place. The result is 36.7. (ii) `3.0 XX 10^(-8) + 4.5 xx 10^(-6)` `= 0.03 xx 10^(-6) + 4.5 xx 10^(-6)` `= 4.53 xx 10^(-6)` Here ` 4.5 xx 10^(-6)` has only one decimal place and`0.03 xx 10^(-6)` can have two decimal places. This result should be rounded off to one decimal place. `therefore (3.0 xx 10^(-8) ) + (4.5 xx 10^(-6) ) = 4.5 xx 10^(-6)` |
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