Estimate Quotients

When the problem does not require an exact answer, we use estimation

To estimate a quotient, we find compatible numbers. Quotient is the answer to a division problem

To estimate the quotient of 348 ÷ 9, use division facts to find a compatible number so that we can solve the problem mentally

270 and 9 are compatible numbers because they are easy to divide mentally. Similarly, 360 and 9 are compatible numbers

270 ÷ 9 = 30 and 360 ÷ 9 = 40. 348 is closer to 360 than 270. So, the better estimate of 348 ÷ 9 is 40

To estimate the quotient, use compatible numbers. Compatible numbers are close to the numbers in a problem and are easy to divide mentally

For example, 352 ÷ 40
36 ÷ 4 = 9 so, 360 ÷ 40 = 9
352 is close to 360. 360 and 40 are compatible numbers because they are easy to divide mentally
The estimated quotient of 352 ÷ 40 is 9