Question

Estimating fractions sums

Answer 1

We are given the following sum of fractions

`(3)/(7)-(1)/(5)`

We are asked to round off each term to 0, 1/2, or 1.

Notice that the term 3/7 (0.43 in decimal) is closest to 1/5 (0.50 in decimal), so we will round off 3/7 to 1/2

The term 1/5 (0.20 in decimal) is closest to 0, so we will 1/5 to 0.

So, the fractions become

`(1)/(2)-0=(1)/(2)`

Therefore, the estimated sum of fractions is 1/2