Estimating Quotients
Mia has 42 stickers to share evenly with 8 friends. About how many stickers will each friend get?
About 5 since 40/8=5
Use the commutative property.
3 x 8 x 50 = 50 x __ x 8
3
120 pencils are split evenly among 3 classrooms. How many pencils per class?
40
Estimate: 6 x 49
About 300 (6 x 50)
You know 8 x 5 = 40. What's 16 x 5 using mental math?
Double 40 -> 80
Estimate: 95/10
About 9 or 10
4 x 6 x 15
360
125/5=
25
A store sells 78 notebooks for $4 each. Estimate the total cost.
About 320 (4 x 80)
Estimate 432/8 using a friendly number.
400/8=50
Estimate 182/9
About 20 since 180/9=20
5 x 7 x 30
1050
900/3=
300
Estimate: 8 x 32
About 240 (8 x 30)
36 x 5 =
180
There are 243 apples to pack into bags of 8. About how many bags can be filled.
30
30 x 8 x 3
720
1800/9=
200
Estimate: 7 x 56
About 420 (7 x 60)
523 candies are divided among 9 students. Estimate how many each student gets.
About 60
Estimate: 290/6
About 50 since 300/6=50
20 x 7 x 8
1120
7200/8=
900
9 busses each carry 47 students. Estimate how many students in total.
About 450 (9 x 50)
Using mental math divide: 480/6
80