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L a t t i c e M u l t i p l i c a t i o n

L a t t i c e M u l t i p l i c a t i o n. The coolest way to multiply ! By : Merilee Cox Grade: 4. Standard. M4N3. Students will solve problems involving multiplication of 2-3 digit numbers by 1 or 2 digit numbers. . Lattice Multiplication may give you a new way to get to same answer. .

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L a t t i c e M u l t i p l i c a t i o n

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  1. Lattice Multiplication The coolest way to multiply! By: Merilee Cox Grade: 4

  2. Standard • M4N3. Students will solve problems involving multiplication of 2-3 digit numbers by 1 or 2 digit numbers.

  3. Lattice Multiplication may give you a new way to get to same answer.

  4. Here’s the box…It’s got a spot for tens and a spot for ones:

  5. Let’s try 4 x 3 3 4 1 2 So, 4 x 3 = 12

  6. Get it? Here’s another one!

  7. Let’s try 3 x 2 2 3 0 6 So, 3 x 2 = 6

  8. Let’s try two digits!

  9. I Let’s take another look! 1 4 5 6 5 0 0 2 0 0 6 2 4

  10. Now, just add down the diagonal stripes...  Start at the bottom and work your way up the stripes:

  11. I Here is another look! 1 4 5 6 5 0 0 2 0 0 6 2 4 0 8 4 7 So, 14 x 56 = 784

  12. I Let’s Do Another One! 17 x 52 1 7 5 2 5 0 0 3 5 0 2 1 4 0 8 4 8 So, 17 x 52 = 884

  13. 2 0 1 We Can Also Do Three Digit by Two Digit 240 x 13 3 0 1 2 4 0 1 3 0 2 0 4 0 0 0 6 1 0 0 2 So, 240 x 13 = 3,120

  14. So what do you think?

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