Question

Question 177

Estimate each of the following by rounding off each number to nearest hundreds.

(a) 874 + 478

(b) 793 + 397

(c) 11244 + 3507

(d) 17677 +13589

Answer 1

(a) We have , 874+478

Rounded off 874 to nearest hundreds = 900

and rounded off 478 to nearest hundreds = 500

So, estimated sum = 900 + 500 = 1400

(b) We have, 793 +397

Rounded off 793 to nearest hundreds = 800

and rounded off 397 to nearest hundreds = 400

So, estimated sum = 800 + 400 = 1200

(c) We have, 11244 + 3507

Rounded off 11244 to nearest hundreds = 11200

and rounded off 3507 to nearest hundreds = 3500

So, estimated sum = 11200 + 3500 = 14700

(d) We have, 17677 + 13589

Rounded off 17677 to nearest hundreds = 17700

and rounded off 13589 to nearest hundreds = 13600

So, estimated sum = 17700 + 13600 = 31300