Verified Answer :

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:

190,000.

Step-by-step 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.

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