Partial Products Algorithm Partial Products Algorithm for Multiplicationfor Multiplication

Created by Rina Iati

South Western School District

Hanover, PA

Created By Rina Iati, South Western SchooCreated By Rina Iati, South Western School Districtl District

Calculate 50 X 60

67X 53

Calculate 50 X 7

3,000 350 180 21

Calculate 3 X 60

Calculate 3 X 7 +Add the results 3,551

To find 67 x 53, think of 67 as 60 + 7 and 53 as 50 + 3. Then multiply each part of one sum by each part of the other, and add the results

Created By Rina Iati, South Western SchooCreated By Rina Iati, South Western School Districtl District

Calculate 10 X 20

14X 23

Calculate 20 X 4

200 80 30 12

Calculate 3 X 10

Calculate 3 X 4 +Add the results 322

Let’s try another one.

Created By Rina Iati, South Western SchooCreated By Rina Iati, South Western School Districtl District

Calculate 30 X 70

38X 79

Calculate 70 X 8

2, 100 560 270 72

Calculate 9 X 30

Calculate 9 X 8 +Add the results

Do this one on your own.

3002

Let’s see if you’re right.

Created By Rina Iati, South Western SchooCreated By Rina Iati, South Western School Districtl District