Question

How can you use 1300 divided by 13 to help you find 1,287 divided 13

Answer 1

Explanation:

This question is about the benefits of estimation.

1300/13 is easy and results in 100.

1287/13 can be approximated by 1300/13: 1287/13 ≈ 100.

Actually, 1287 = 1300 - 13 = 13(99); just subtract 1 from 100.

So: 1287/13 = 1300 - 13 = 1287. A nice bit of mental math!