1. Partial Products Algorithm for Multiplication
Focus Algorithm

2. 6 7 X 5 3 3,000 350 180 21 + 3,551 Add the results Calculate 50 X 60
To find 67 x 53, think of 67 as and 53 as Then multiply each part of one sum by each part of the other, and add the results 6 7 X 5 3
3,000
Calculate 50 X 60
350
Calculate 50 X 7
180
Calculate 3 X 60 21 +
Calculate 3 X 7
3,551
Add the results

3. 1 4 X 2 3 200 80 30 12 + 322 Let’s try another one. Add the results
Calculate 10 X 20 80
Calculate 20 X 4 30
Calculate 3 X 10 12 +
Calculate 3 X 4
322
Add the results

4. 3 8 X 7 9 2,100 560 270 72 + 3,002 Do this one on your own.
Let’s see if you’re right. X 7 9
2,100
Calculate 30 X 70
560
Calculate 70 X 8
270
Calculate 9 X 30 72 +
Calculate 9 X 8
3,002
Add the results