Partial Products Algorithm for Multiplication Created by Rina Iati South Western School District Hanover, PA

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

Created By Rina Iati, South Western School District Let’s try another one. 1 4 X 2 3 200 Calculate 10 X 20 80 Calculate 20 X 4 30 Calculate 3 X 10 12 + Calculate 3 X 4 322 Add the results Created By Rina Iati, South Western School District

Created By Rina Iati, South Western School District Do this one on your own. 3 8 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 3002 Add the results Created By Rina Iati, South Western School District

Created By Rina Iati, South Western School District