We can round off each term to its nearest hundred or thousand to make our calculation easy. Then we can get the estimated sum as:
730 round off to=700998 round off to=1,000Estimated sum=1,700
Question 1(a) Estimate the following using general rule: 730 + 998
Estimate each of the following using general rule:
(a) 730 + 998 (b) 796 − 314 (c) 12, 904 + 2, 888
(d) 28, 292 − 21, 496
Make ten more such examples of addition, subtraction and estimation of their outcome.