Question

Estimate the sum of 3879 and 5276.

Answer 1

1 1 5276 + 3879 ---------------- 9 1 5 5 ------------------ is 9000

Answer 2

3,879 rounds to 4,000

5,279 round to 5,000

4,000+5,000= 9,000

CHECK YOUR WORK:

3,878

+5276

------------

9,155 so about 9,000

So about 9,000