Estimating Products
Estimate then multiply!
45 ------>
x 12 ------>
50 x 10 = 500
Round to the hundreds place then add.
123
+ 564
100 + 600 = 700
George visits a store to buy 2 ash drives. They are priced at $28 each. How much does he need to spend on his purchase?
$56
56
x 32
1,792
426
x 3
1,278
Round then multiply!
92 ------>
x 94 ----->
90 x 90 = 1,800
Round to the nearest thousand and subtract.
6,932
- 2,137
5,000
Jim goes to a movie with his parents and brother. Each movie ticket costs $20. How much in all does Jim pay for the tickets?
$80
77
x 11
847
117
x 9
1,053
Round then multiply!
22 --->
x 18 ---->
20 x 20 = 400
Round to the nearest ten thousand then add.
92,654
- 35,234
50,000
James, a crane operator works on 8 hour shifts everyday. If he worked 22 days in a month, how many hours of work did he put in altogether?
176 hours
24
x 39
936
629
x 4
2,516
Round then multiply
47 ---->
x 32 ---->
50 x 30 = 1,500
Round to the nearest thousand then subtract.
56,297
- 34,823
21,000
A small dairy farm produces 87 gallons of milk in a day. How many gallons of milk will it produce in 15 days?
1,305 gallons
48
x 82
3,936
528
x 7
3,696
Round then multiply!
88 ----->
x 68 ----->
90 x 70 = 6,300
Round to the nearest ten thousand and add.
845,755
- 237,782
610,000
The auditorium at Lion’s school has 28 rows in all. If each row consists of 95 seats, calculate the total capacity of the auditorium?
2,660 seats
99
x 54
5,346
903
x 2
1,806