1. LatticeMultiplicationLatticeMultiplication 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:

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

7. Get it? Here’s another one!

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

10. Let’s try two digits!

13. I Let’s take another look! 1 4 5 6 0 5 02 0 06 42

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

16. I Here is another look! 1 4 5 6 0 5 02 0 06 42 4 8 7 0 So, 14 x 56 = 784

17. I Let’s Do Another One! 17 x 52 1 7 5 2 0 5 53 0 02 41 4 8 8 0 So, 17 x 52 = 884

18. We Can Also Do Three Digit by Two Digit 240 x 13 2 4 0 1 3 0 2 4 0 00 60 0 0 2 1 2 0 1 0 3 1 So, 240 x 13 = 3,120

19. So what do you think?