Download Multiplication Strategy: Partial Products

Ver.1
Multiplication Strategy: Partial Products
Materials: Multiplication Equations Board (1 x 2 digit or 1 x 3 digit)
______________________________________________________________________________________________________________________________________
1. Choose a line of four problems from the board (vertically,
horizontally or diagonally).
2. Solve each problem by breaking the factors into parts that are
easier to multiply. Solve the easier problems and then add the
partial products.
Example: 4 x 39 =
(4 x 30) + (4 x 9)
120 + 36 = 156
or
x
30
4
120
9
36
120 + 36 = 156
x
Example: 3 x 425 =
(3 x 400) + (3 x 20) + (3 x 5) or 3
1,200 + 60 + 15 = 1,275
400
20
5
1200
60
15
1200 + 60 = 15 = 1,275
©K-5MathTeachingResources.com
4 x 28 =
5 x 64 =
6 x 27 =
7 x 82 =
8 x 23 =
9 x 34 =
3 x 42 =
6 x 36 =
5 x 15 =
4 x 18 =
4 x 22 =
4 x 31 =
7 x 33 =
82 x 4 =
44 x 3 =
32 x 6 =
©K-5MathTeachingResources.com
4 x 212 = 5 x 126 = 6 x 232 = 7 x 148 =
8 x 213 = 9 x 324 = 3 x 344 = 6 x 236 =
9 x 137 = 5 x 215 = 4 x 262 = 7 x 131 =
7 x 124 = 8 x 225 = 4 x 145 = 2 x 623 =
©K-5MathTeachingResources.com