Key words for Key words for rounding and rounding and

estimatingestimating

Key words for Key words for rounding and rounding and

estimatingestimating

Unit 1.6Unit 1.6

Sample Problem

197 – 50 = 147

Rounding

To write a number to a given amount of accuracy.      Rounding 197 to the nearest 100 would be 200

197 – 50 = 147

200

Estimate To give a rough answer that may be

a little less or a little more than the actual result.      To estimate 197 – 50 you may instead work out 200 – 50 to give an estimate of 150.

197 – 50 = 147

200 - 50= 150