Question

When 2610 m + 11.7 m + 0.22 m are added, the answer to the correct number of decimal places is (assume ambigous zeros to be nonsignificant)?

Answer 1

We only know the first number to three significant figures so we can approximate the rest as 10 and call the sum 2620.

Answer 2

two decimals.

Explanation

The sum of the decimal part can be viewed of the following form:

2610.00 + 11.70+0.22 so, the sum of the decimal part is 0+70+22 = 92.

Then, there are two decimal places in the answer.