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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 27 21 280 60 + 800 1,161 Do you recognize this method? I am confused.
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2 43 x 27 301 + 860 1,161 Do you recognize this method? Did your parents try to teach you this method? I am more confused.
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43 2 7 6 0 2 1 0 8 2 8 1 6 1 1 Do you recognize this method? What?
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25 x 36 30 (6 x 5)
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25 x 36 30 (6 x 5) 120 (6 x 20)
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25 x 36 30 (6 x 5) 120 (6 x 20) 150 (30 x 5)
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25 x 36 30 (6 x 5) 120 (6 x 20) 150 (30 x 5) 600 (30 x 20)
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25 x 36 30 (6 x 5) 120 (6 x 20) 150 (30 x 5) + 600 (30 x 20)
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25 x 36 30 (6 x 5) 120 (6 x 20) 150 (30 x 5) + 600 (30 x 20) 900
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25 x 36 30 (6 x 5) 120 (6 x 20) 150 (30 x 5) + 600 (30 x 20) 900
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25 x 36 30 (6 x 5) 120 (6 x 20) 150 (30 x 5) + 600 (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 36 150 (6 x 5 = 30) Write the 0, regroup 3 ( (6 x 2) + 3 = 15)
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3 25 x 36 150 (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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1 3 25 x 36 150 (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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1 3 25 x 36 150 (6 x 5 = 30) Write the 0, regroup 3 750 ( (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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1 3 25 x 36 150 (6 x 5 = 30) Write the 0, regroup 3 750 ( (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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1 3 25 x 36 150 (6 x 5 = 30) Write the 0, regroup 3 750 ( (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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1 3 25 x 36 150 (6 x 5 = 30) Write the 0, regroup 3 750 ( (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. 25 3 6
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Multiply the red digits. 25 3 6 1 5
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Multiply the green digits. 25 3 6 1 5 0 6
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Multiply the blue digits. 25 3 6 1 5 0 6 3 0
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Multiply the purple digits. 25 3 6 1 5 0 6 3 0 1 2
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Add the digits in the lane with the thin arrow. 25 3 6 1 5 0 6 3 0 1 2 0 Start here.
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Add the digits in the lane with the arrow. 25 3 6 1 5 0 6 3 0 1 2 00 1
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Add the digits in the lane with arrow. 25 3 6 1 5 0 6 3 0 1 2 00 1 Regroup one group of ten in next lane.
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Add the digits in the lane with the arrow. 25 3 6 1 5 0 6 3 0 1 2 00 1 9
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25 3 6 1 5 0 6 3 0 1 2 00 1 9 The product is 900.
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25 3 6 1 5 0 6 3 0 1 2 00 1 9
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25 3 6 1 5 0 6 3 0 1 2 00 1 9
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Repeated Addition
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62 x 15
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62 x 15 10 (5 x 2) 20 (10 x 2) 300 (5 x 60) +600 (10 x 60) 930
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62 x 15 310 +620 930
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62 1 5 0 2 1 0 0 6 3 0 9 30
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http://www.superteacherworksheets.com/lattice/lattice2.pdf Lattice grid
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