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Published byMercy Madeleine Booker Modified over 7 years ago

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How to Multiply using Lattice

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Step 1: How many boxes to you need? 23 X 5 You need 2 boxes on top and 1 on the side.

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Step 2: Set up the Lattice Box 2 3 5

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2 3 5 Step 3: Multiply 2 by 5 1 0

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2 3 5 Step 4: Multiply 3 by 5 0 1 5 1

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2 3 5 Step 5: Add the numbers between the slanted lines 0 1 5 1 5 1 1

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2 3 5 Step 6: Write your answer to the problem 0 1 5 1 5 1 1 23 x 5 =115

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Multiplying 2 digit by 2 digit

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Step 1: How many boxes to you need? 47 X 12 You need 2 boxes on top and 2 on the side.

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Step 2: Set up the Lattice Box 4 7 1 2

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Step 3: Multiply 4 by 1 4 7 1 2 4 0

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Step 4: Multiply 4 by 2 4 7 1 2 0 4 0 8

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Step 5: Multiply 7 by 1 4 7 1 2 0 4 0 8 7 0

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Step 6: Multiply 7 by 2 4 7 1 2 0 4 0 8 7 0 4 1

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Step 7: Add up the numbers between the slanted lines. 4 7 1 2 0 4 0 8 7 0 4 1 0 5 6 4 1 If sum = more than 9, carry by adding the number to the slanted row to the left.

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Step 8: Write the answer to the multiplication problem. 4 7 1 2 0 4 0 8 7 0 4 1 0 5 6 4 1 47x12=564

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Step 1: How many boxes to you need? 783 X 532 You need 3 boxes on top and 3 on the side.

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Step 2: Set up your lattice box. 7 8 3 532532

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Step 3: Multiply 7 by 5, 3, & 2. 7 8 3 532532 3 2 5 1 1 4

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Step 4: Multiply 8 by 5, 3, & 2. 7 8 3 532532 3 2 5 1 1 4 4 0 2 4 1 6

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Step 5: Multiply 3 by 5, 3, & 2. 7 8 3 532532 3 2 5 1 1 4 4 0 2 4 1 6 5 1 0 9 0 6

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Step 6: Add up the numbers between the slanted lines. 7 8 3 532532 3 2 5 1 1 4 4 0 2 4 1 6 5 1 0 9 0 6 65 5 6 1 4 1 11 If the sum = more than 9, carry by adding the number to the slanted row to the left.

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Step 7: Write the sum of the multiplication problem. 7 8 3 532532 3 2 5 1 1 4 4 0 2 4 1 6 5 1 0 9 0 6 65 5 6 1 4 1 11 783 x 532 = 416,556

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