Math: Multiplication

The students are learning multiplication in math. We've discussed how they can solve multiplication problems (5x2) by using repeat addition (2+2+2+2+2) or using a number line to skip count (2,4,6,8,10). We now introduced how they can build arrays. They used rows and columns to find the answer 5 by 2 = 10.

I had students divide into groups and then gave them a number on an index card. That number represented the "product" and they had to find the factors that would make the product. They found that some products have multiple groups of factors (fact families).

For example, 18 can have the following factors:

1x18 and 18x1

2x9 and 9x2

3x6 and 6x3