Presented by Barb Pecoraro. 26 x37 54 x 97 = 81* 62 =

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Presentation transcript:

Presented by Barb Pecoraro

26 x37 54 x 97 = 81* 62 =

Traditional Partial Products Lattice Your Own Method I am confused

43 x ,161 Do you recognize this method? I am confused.

2 43 x ,161 Do you recognize this method? Did your parents try to teach you this method? I am more confused.

Do you recognize this method? What?

25 x (6 x 5)

25 x (6 x 5) 120 (6 x 20)

25 x (6 x 5) 120 (6 x 20) 150 (30 x 5)

25 x (6 x 5) 120 (6 x 20) 150 (30 x 5) 600 (30 x 20)

25 x (6 x 5) 120 (6 x 20) 150 (30 x 5) (30 x 20)

25 x (6 x 5) 120 (6 x 20) 150 (30 x 5) (30 x 20) 900

25 x (6 x 5) 120 (6 x 20) 150 (30 x 5) (30 x 20) 900

25 x (6 x 5) 120 (6 x 20) 150 (30 x 5) (30 x 20) 900

3 25 x 36 0 (6 x 5 = 30) Write the 0, regroup 3

3 25 x (6 x 5 = 30) Write the 0, regroup 3 ( (6 x 2) + 3 = 15)

3 25 x (6 x 5 = 30) Write the 0, regroup 3 0 ( (6 x 2) + 3 = 15) Write a 0; Cross out 3

x (6 x 5 = 30) Write the 0, regroup 3 50 ( (6 x 2) + 3 = 15) Write a 0; Cross out 3 (3 x 5 = 15) Write the 5; regroup 1

x (6 x 5 = 30) Write the 0, regroup ( (6 x 2) + 3 = 15) Write a 0; Cross out 3 (3 x 5 = 15) Write the 5; regroup 1 ( (3 x 2) + 1 = 7) Write the 7

x (6 x 5 = 30) Write the 0, regroup ( (6 x 2) + 3 = 15) 900 Write a 0; Cross out 3 (3 x 5 = 15) Write the 5; regroup 1 ( (3 x 2) + 1 = 7) Write the 7 Add

x (6 x 5 = 30) Write the 0, regroup ( (6 x 2) + 3 = 15) 900 Write a 0; Cross out 3 (3 x 5 = 15) Write the 5; regroup 1 ( (3 x 2) + 1 = 7) Write the 7 Add

x (6 x 5 = 30) Write the 0, regroup ( (6 x 2) + 3 = 15) 900 Write a 0; Cross out 3 (3 x 5 = 15) Write the 5; regroup 1 ( (3 x 2) + 1 = 7) Write the 7 Add

Draw the lattice grid.

Write the two factors

Multiply the red digits

Multiply the green digits

Multiply the blue digits

Multiply the purple digits

Add the digits in the lane with the thin arrow Start here.

Add the digits in the lane with the arrow

Add the digits in the lane with arrow Regroup one group of ten in next lane.

Add the digits in the lane with the arrow

The product is 900.

Repeated Addition

62 x 15

62 x (5 x 2) 20 (10 x 2) 300 (5 x 60) +600 (10 x 60) 930

62 x

Lattice grid