Name __________________________________ Date ________ Period_________
Estimating Quotients
Estimate quotients by using compatible numbers.
1.) 296 ÷ 5 = ____________________________________________________
2.) 150 ÷ 4 = ____________________________________________________
3.) 244 ÷ 5 = ____________________________________________________
4.) 719 ÷ 9 = ____________________________________________________
5.) 138 ÷ 2 = ____________________________________________________
6.) 103 ÷ 3 = ____________________________________________________
7.) 894 ÷ 3 = ____________________________________________________
8.) 718 ÷ 8 = ____________________________________________________
9.) 608 ÷ 6= _____________________________________________________
10.) 787 ÷ 2 = ____________________________________________________
11.) 99 ÷ 5 = ____________________________________________________
12.) 811 ÷ 4 = ___________________________________________________
What did we talk about today???
Vocabulary:
Dividend → the number that is being split into groups in the division problem
Divisor → the number being divided into the divisor
Quotient → the answer to a division problem
Compatible number → numbers that are easy to calculate mentally
How to use compatible numbers to estimate in division:
Step 1 → Look at the first one or two digits in the dividend. Ask yourself: What is
the closest number that forms a basic fact with the divisor?
Example: 78 ÷ 4 Think: 7 ÷ 4 is close to 8 ÷ 4
Step 2 → Round the dividend so that it uses the basic fact. The rounded numbers
are called compatible numbers.
Example: 78 ÷ 4 is close to 80 ÷ 4
Step 3 → Use mental math to help you divide.
Example: 80 ÷ 4 = 20 (8 ÷ 4 = 2 and bring the zero(s) over if you are dividing by a
single digit.
Example #2:
247 ÷ 5
Think: 24 ÷ 5 is close to 25 ÷ 5 so
247 ÷ 5 is close to 250 ÷ 5
250 ÷ 5 = 50