Question

Evaluate 1 whole number 2/5 + 3/4 and give your answer to one significant figure​

Answer 1

The answer is

2 to 1 significant figure

Explanation:

`1 (2)/(5) + (3)/(4)`

To solve the question first convert the mixed fraction to an improper fraction

That's

`1 (2)/(5) = (7)/(5)`

So we have

`(7)/(5) + (3)/(4)`

Find the LCM of the fractions

The LCM of 5 and 4 is 20

That's

`(7)/(5) + (3)/(4) = (7(4) + 3(5))/(20) = (28 + 15)/(20)`

`= (43)/(20)`

= 2.15

We have the final answer as

2 to 1 significant figure

Hope this helps you