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Lattice Multiplication
 

Lattice Multiplication

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Found this on the Net - just great

Found this on the Net - just great

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    Lattice Multiplication Lattice Multiplication Presentation Transcript

    • Lattice Multiplication Step-by-Step
    • 356 * 25 = I don’t remember how to multiply!!!
    • HELP!!! I can help!! Let me show you how to do Lattice Multiplication.
    • 356 * 25 3 5 6 2 5 Make a grid the exact size of your problem. A 2 digit number times a 3 digit number gets a 2 x 3 grid. Draw a diagonal line in each box.
    • 356 * 25 3 5 6 2 5 1 2 Multiply 6 * 2 and place the answer in the grid where the lines meet.
    • 356 * 25 3 5 6 2 5 1 2 0 1 Multiply 5 * 2 and place the answer in the grid where the lines meet.
    • 356 * 25 3 5 6 2 5 1 2 0 1 6 0 Multiply 3 * 2 and place the answer in the grid where the lines meet. Use a zero as a place holder.
    • 356 * 25 3 5 6 2 5 1 2 0 1 6 0 0 3 Multiply 6 * 5 and place the answer in the grid where the lines meet.
    • 356 * 25 3 5 6 2 5 1 2 0 1 6 0 0 3 Multiply 5 * 5 and place the answer in the grid where the lines meet. 5 2
    • 356 * 25 3 5 6 2 5 1 2 0 1 6 0 0 3 Multiply 3 * 5 and place the answer in the grid where the lines meet. 5 2 5 1
    • 356 * 25 3 5 6 2 5 1 2 0 1 6 0 0 3 Now add the diagonals and place the answer below the grid. Be sure to carry to the next diagonal if you have a 2 digit answer. 5 2 5 1 0
    • 356 * 25 3 5 6 2 5 1 2 0 1 6 0 0 3 Now add the diagonals and place the answer below the grid. Be sure to carry to the next diagonal if you have a 2 digit answer. 5 2 5 1 0 0 +1
    • 356 * 25 3 5 6 2 5 1 2 0 1 6 0 0 3 Now add the diagonals and place the answer below the grid. Be sure to carry to the next diagonal if you have a 2 digit answer. 5 2 5 1 0 0 +1 9
    • 356 * 25 3 5 6 2 5 1 2 0 1 6 0 0 3 Now add the diagonals and place the answer below the grid. Be sure to carry to the next diagonal if you have a 2 digit answer. 5 2 5 1 0 0 +1 9 8
    • 356 * 25 3 5 6 2 5 1 2 0 1 6 0 0 3 Now add the diagonals and place the answer below the grid. Be sure to carry to the next diagonal if you have a 2 digit answer. 5 2 5 1 0 0 +1 9 8
    • 356 * 25 = 8,900 That is Soooo Cool!!! Thanks!