Question

Estimate 137,638 plus 52,091

Answer 1

First round
137,638=100,000
52,091=50,000
Then add to get the estamate
100,000
+
50,000
150,000
Then to get the real answer add
1
137,638
+
52091
189,729

Answer 2

190,000.

Explanation:

We are asked to estimate the sum of 137,638 plus 52,091.

First of all, we will round both digits to nearest ten thousands as:

`137,638\approx 140,000`

`52,091\approx 50,000`

Add both numbers:

`140,000+50,000=190,000`

Therefore, our required sum would be 190,000.