Compatible Numbers/Estimate
Name two compatible numbers you can use to quickly estimate 182 ÷ 9.
180 and 9
A teacher divides 48 pencils equally among 6 groups. Write an equation using p to show how many pencils each group gets.
48 ÷ 6 = p?
Solve 187 ÷ 5
37 R 2
23 x 3
69
73 - 28
45
Change both numbers in 2,485 ÷ 22 to compatible numbers to find a reasonable estimate.
2,500 ÷ 25 or 2,400 ÷ 20
A bakery puts 120 muffins into boxes, placing 8 muffins in each box. Write an equation using b to find the total number of boxes.
120 ÷ 8 = b?
Solve 438 ÷ 7
62 R 4
42 x 4
168
92 - 47
45
A bakery packs 3,180 cookies into boxes of 28. Using compatible numbers, write an equation to estimate the number of boxes needed.
3,000 ÷ 30 = 100?
An auditorium has 345 chairs arranged into 15 equal rows. Write an equation using c to show the number of chairs in each row.
345 ÷ 15 = c
758 ÷ 24
31 R 14
68 x 7
476
435 - 168
267
4,321 ÷ 58 using compatible numbers.
4,200 ÷ 60 = 70?
A factory produces 2,800 juice boxes in an hour and packs them into cartons of 24. Write an equation using j to show how many cartons they can fill.
2,800 ÷ 24 = j
1,482 ÷ 32
46 R 10
85 x 9
765
612 - 385
227
A field trip has 6,230 students. If each charter bus holds 73 passengers, use compatible numbers to estimate how many buses are needed.
6,300 ÷ 70 = 90 buses
A school trip has 1,512 students traveling on 36 buses, with the same number of students on each bus. Write an equation using s to show how many students are on each bus.
1,512 ÷ 36 = s
4,315 ÷ 53
81 R 22
97 x 8
776
804 - 457
347