Multiply 2-Digit Numbers Worksheet With Answer Key Page 9
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10LESSON 12.1
Name
Multiply 2-Digit Numbers
Solve 12
15 by using the partial-products method.
Step 1
Step 2
Step 3
Step 4
Partial Products
1 5
1 5
1 5
1 5
1 5
1 2
1 2
1 2
1 2
1 2
2
5
1 0
Step 5
2
10
2 0
10
5
5 0
Add partial products together.
10
10
1 0 0
10
20
50
100
180
product → 1 8 0
The product of 12 and 15 is 180.
Multiply by using the partial-products method.
1.
2.
3.
3 1
4 6
7 9
1 7
2 8
5 6
7
1
7
8
6
4 8
6
9
5 4
7
30
2 1 0
8
40
3 2 0
6
70
4 2 0
10
1
1 0
20
6
1 2 0
50
9
4 5 0
10
30
3 0 0
20
40
8 0 0
50
70
3, 5 0 0
product →
product →
product →
5 2 7
1, 2 8 8
4, 4 2 4
82
63
92
4.
5.
6.
25
47
34
10
21
8
400
420
360
40
120
60
1,600
2,400
2,700
2,050
2,961
3,128
Reteach RW61
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