Estimation/Compatible Numbers
Estimate the Quotient:
989 / 10
989 / 10
1000 / 10 = 100
479 / 5
95 R4
523 / 10
52 R3
5 - 8 / 2 + 7
8
There are 4 bags of apples. Each bag has 6 apples, and 2 extra apples are added to each bag. Write an expression to show how many apples there are in total. Solve.
4 x (6 + 2) = 32 apples
Estimate the quotient:
623 / 6
623 / 6
600 / 6 = 100
1806 / 6
301
945 / 15
63
(8 x 7) + (56 / 8)
63
A bakery makes 5 trays of cookies. Each tray has 12 cookies, but 3 cookies from each tray are burned. Write an expression to show how many cookies are left.
5 x (12 - 3) = 45 cookies
Estimate the quotient. Use compatible numbers:
651 / 8
651 / 8
640 / 8 =80
4036 / 4
1009
49 / 24
2 R1
20 / 4 - 4 + (81 / 9)
10
A school has 48 students going on a trip. They are split evenly into 6 groups, and then 2 more students join each group. Write an expression to show how many students there are now in total.
48 + 6 x 2 = 60 students
or
(48/6 + 2) x 6 = 60 students
Estimate the quotient. Use compatible numbers:
71,548 / 900
71,548 / 900
72,000 / 900 = 80
8916 / 9
990 R6
3502 / 17
206
10^3 - 4 x 200 + 16/4
204
A farmer has 8 baskets with 15 oranges in each basket. He sells 4 oranges from each basket and then buys 20 more oranges. Write an expression to show how many oranges the farmer has now.
8 x (15 - 4) + 20 = 108 oranges
Estimate the quotient. Use compatible numbers:
8,289 / 42
8,289 / 42
8000 / 40 = 200
8024 / 3
2674 R2
1836 / 31
59 R7
8 + 5 x 2 / 5 + (7 - 5)^4
26
A toy store has 96 toy cars. The cars are divided equally onto 8 shelves. Then 5 more cars are added to each shelf, and 16 cars are sold from the store. The shelves are organized to have the same number of toys. Write an expression to show the number of toys on each shelf.
(96 + 5 x 8 - 16) / 8 = 15 toys
(96/8 +5) - 16/8 = 15 toys