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Published byHarry Swallow Modified about 1 year ago

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Presented by Barb Pecoraro

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26 x37 54 x 97 = 81* 62 =

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Traditional Partial Products Lattice Your Own Method I am confused

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

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

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Do you recognize this method? What?

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25 x (6 x 5)

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

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

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

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

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

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

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

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

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

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

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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

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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

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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

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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

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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

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Draw the lattice grid.

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Write the two factors

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Multiply the red digits

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Multiply the green digits

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Multiply the blue digits

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Multiply the purple digits

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

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Add the digits in the lane with the arrow

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

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Add the digits in the lane with the arrow

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The product is 900.

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Repeated Addition

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62 x 15

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

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62 x

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Lattice grid

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