Use compatible numbers to find two estimates 1322 divided by 18

Compatible numbers is used to find estimate to a sum. The numbers are chosen because its 'simplicity' when they are multiplied, divided, added or subtracted.

Estimate one:

We can decrease the value 1322 to 1320 and 18 to 15

Then do the sum = 1320:15 = 88

This estimate is not far from the actual answer 1322:18 = 73.44 ...

Estimate two:

We can increase 1322 to 1330 and 18 to 20

Then do the sum 1330:20=66.50

This estimate is also not far from the actual answer 73.44 ...