Estimating Products
Estimate the product.
23 x 51
20 x 50 = 1,000
100 x 6
600
Rachel buys cards for her office that come in boxes of 123 envelopes. If she buys 16 boxes, how many envelopes will she have in all?
1,968 envelopes
Multiply.
56 x 10.
560
53 x 10^1
530
Estimate the product.
813 x 78.
810 x 80 = 64,800
800 x 80 = 64,000
Multiply.
1,245 x 2.
2,490
Danny flies 764 miles round trip to visit his parents in Hawaii. What is the total distance in miles that he would fly for 14 visits to his parents' house?
10,696 miles
Ellie has 22 bags of apples. If each bag of apples weighs 11 pounds, what is the total weight of all the bags of apples?
242 pounds
24 x 10^2
2,400
Estimate the product:
291 x 12
290 x 10 = 2,900
300 x 10 = 3,000
Multiply.
2,376 x 3.
7,128
The new Harry Styles CD sells for $13 each. On Saturday, the store sold 142 CD's. What was the dollar amount of sales of the CD's on Saturday? Write an equation to model your work.
13 x 142 = 1,846 CD's
Multiply.
315 x 62
19,530
68 x 10^0
68
Estimate the product.
234 x 61
230 x 60 = 13,800
200 x 60 = 12,000
Harper has 34 tables set up for her party. Each table has 5 chairs. How many chairs will there be in all?
170 chairs
A show is playing at a theater that has 538 seats. How many tickets are available for 36 shows?
19,368 tickets
The new Taylor Swift CD sells for $17 each. On Sunday, the store sold 163 CD's. What was the dollar amount of sales of the CD's on Sunday? Write an equation to model your work.
17 x 163 = 2,771 CD's
67 x 1,000
67,000
Roosevelt School ordered 119 cartons of history books. The books were shipped in cartons that each held 38 books.
Estimate the total number of history books in the shipment. Write an equation to model your work.
120 x 40 = 4,800 books
On a family trip, Stella took 1,276 pictures. Her twin sister, Pam, took 4 times as many photos as Stella. Write and solve an equation to find 'p', the number of photos that Pam took.
1,276 x 4 = p
p = 5,104
A book store shipped 27 boxes of book to the store. Each box weighed 213 pounds. What was the total weight of the books?
5,751 pounds
Gary has 228 e-books on his e-reader. Kim has 14 times as many e-books as Gary. How many e-books does Kim have?
3,192 e-books
Is the equation below correct? Explain
7.9 x 10^4 = 7,900
The equation is incorrect. The product should have 3 zeros.