LESSON 2 Fact Families

Using Arrays to Show Fact Families

1. Linda's rectangle has 3 rows of tiles. There are 6 tiles in each row. How many tiles are in Linda's rectangle altogether? Write a number sentence.
2. Ming's rectangle has 6 rows of tiles. There are 3 tiles in each row. How many tiles are in Ming's rectangle altogether? Write a number sentence.
3. Jacob has a rectangle with 18 tiles. There are 3 rows in Jacob's rectangle. How many tiles are in each row? Write a division number sentence for Jacob's rectangle.
4. Keenya's rectangle also has 18 tiles. Her rectangle has 6 rows. How many tiles are in each row? Write a division number sentence for Keenya's rectangle.
These four number sentences are a fact family.

3 6 = 18

6 3 = 18

18 ÷ 3 = 6

18 ÷ 6 = 3

5. Another rectangle has 3 rows of tiles and a total of 24 square tiles.
1. Write a number sentence to fit this rectangle.
2. What are all the other number sentences in the same fact family?
6. Another rectangle has 3 rows of tiles and a total of 24 square tiles.
1. Write a multiplication number sentence for a rectangle with 4 tiles in all and 2 tiles in each row.
2. Can you write a different multiplication sentence for this rectangle? Why or why not?
3. Write a division sentence for this rectangle.
4. Can you write a different division sentence for this number?
5. What is this kind of rectangle called?