1. Area Model for Multiplication 4.NBT.5

2. In this lesson, you will multiply a 2-digit number by a 2-digit number using the area model strategy.

3. 43 x 27 = ?
43 sets of 27
Smart estimate: 45 x 30 = 1,350

4. 43 x 27 = ?
Break apart the numbers by place values
Draw a rectangle and label the dimensions
Multiply
Then add the parts 40 3
40 x 20 = 800
40 x 7 = 280
3 x 7 = 21
3 x 20 = 60
1,161

5. Try Another One: x 45
Break apart the numbers by place values
Draw a rectangle and label the dimensions
Multiply
Then add the parts 30 4
30 x 40 = 1200
30 x 5 = 150
4 x 5 = 20
4 x 40 = 160
1,530

6. Do this one on your own: 26 x 78
Break apart the numbers by place values
Draw a rectangle and label the dimensions
Multiply
Then add the parts 20 6
20 x 70 = 1400
20 x 8 = 160
6 x 8 = 48
6 x 70 = 420
2,028
How did you do?

7. Area Model
This method of multiplying supports students who are visual learners because they can easily see the “parts.” This method also supports student’s geometric knowledge of area.
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