Lattice Multiplication

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LatticeMultiplication
N.FL.05.04 Multiply a multi-digit number by a
two-digit number recognize and be able to
explain common computational error, such a not
accounting for place value.
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What is it?

• Method of multiplying large numbers using a grid
• Algorithmically equivalent to regular long
  multiplication
• Breaks the process into smaller steps

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How does it work?

• A lattice grid is constructed
• The multiplication is done
• That is followed by addition, like in traditional
  multiplication

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• 3568 x 24?

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Step 1 Make the grid
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Step 2 Make diagonal lines
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Step 3 Write the numbers
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Step 4 Multiply
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Step 5 Add the numbers in the
diagonals
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Step 6 Read the left side and bottom and write
the answer
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The Answer is

• 3568 x 24 85632