Basic Facts
2 x 5
10
7 x 10
70
What property says you can break apart the factors, multiply, and then add them back together?
The Distributive Property
21 x 20
420
A good way to estimate a product is to _________ both factors and then multiply.
Round
3 x 6
18
30 x 30
900
What are pieces of the a product called?
Partial Products
33 x 15
495
43 x 17 is about...
800
6 x 8
48
40 x 60
2,400
What kind of model is uses length times width to find all the pieces of a product?
Area Model
46 x 71
3,266
22 x 34 is about...
600
9 x 7
63
80 x 50
4,000
What would the be the missing partial product in the problem? 32 x 21
Partial Products: 2, 30, ____, 600
40
87 x 59
5,133
87 x 61 is about
5,400
7 x 8
56
42,000
List all the partial products for 75 x 46.
30, 420, 200, 2800
94 x 93
8,742
234 x 18 is about...
4,000