This document provides examples of estimating quotients by rounding numbers to make division easier to compute mentally. Estimates are made by rounding both the dividend and divisor to the nearest easy-to-divide numbers to obtain an approximate quotient. Examples show rounding numbers to the nearest thousands, hundreds, or other values that result in quotients like 100, 500, or 1000 to facilitate mental computation of estimates.

1. Estimating Quotients

2. Compatible Numbers
• Estimate: 5,903 6 =
6,000 6=
Estimate: 867 9=
Numbers that are easy to compute mentally.
1,000
900 9 = 100

3. Estimate
• 632 8
• 7,124 8
600 8 = 80
7,200 8 = 900

4. Estimate
• 513 5
• 3,983 8
500 5 = 100
4,000 8 = 500

5. Estimate
• 12,143 6
• 23,983 6
12,000 6 = 2,000
24,000 6 = 400

6. Estimate
1. 712/7 700/7= 100
2. 378/4 400/4= 100
3. 553/5 550/5= 110
4. 156/4 160/4= 40
5. 8,089/8 8,000/8= 1000
6. 6,899/7
7. 13,973/7
7,000/7= 7,000
14,000/7= 2,000

7. 5 1,989
2,000/5=
2,000
6 23,587
24,000/6= 4,000
5 1,789
2,000/5= 400
8 15,751
16,000/8=
400
3 32,598
33,000/3= 11,000
7 13,641
14,000/2= 2,000