1. 1-digit by 4-digit Multiplication

2. 1-digit x 4-digit Multiplication
THINK! Can we apply the same methods we used when we multiplied a 1-digit by 2-digit and 1-digit by 3-digit number to a 1 digit by 4-digit multiplication problem??

3. 1-digit x 4-digit Multiplication
Remember: For every PLACE VALUE added in the number you ADD an area or a rectangle
6 X 23
7 X 233
8 X 6, 345
What patterns do you notice?

4. 2-digit by 2-digit Multiplication

5. 2 x 2-Digit Multiplication

6. 2-digit by 2-digit Multiplication

7. 43 x 27 = ?
Expand the numbers by place values
Draw a rectangle and label the dimensions
Find the “area” of each rectangle by
multiplying the dimensions
Then add the partial products
800
280 60 21 40 3
40 x 7 = 280
40 x 20 = 800 ? +
3 x 7 = 21
3 x 20 = 60
1,161

8. Your Turn!
Practice this problem on your own…
45 X 62