Using known Facts to Find Unknown Facts. You can use breaking apart to find a product. Find 4 x 5.

example: 4 x 5= 2x5+2x5
=10 + 10
=20

Yes!

How can you use 4 facts to find 7x8 ?

To find the product of 4 x 5, you can break it apart and use known facts. Here's how you can do it:

1. Start with the known fact that 4 x 5 is equal to the sum of two groups of 5.

2. Break apart the number 4 into two groups: 2 and 2.

3. Now, rewrite the multiplication problem as the sum of two products: 2 x 5 + 2 x 5.

4. The first product, 2 x 5, is equal to 10.

5. The second product, 2 x 5, is also equal to 10.

6. Finally, add the two products together: 10 + 10 = 20.

Therefore, the product of 4 x 5 is equal to 20.