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# LESSON 1 Facts I Know

## Multiplication Facts and Triangle Flash Cards

**With a partner, use the directions below and your Triangle Flash Cards: 5s and 10s to practice the multiplication facts.**

- One partner covers the shaded number, the largest number on the card. This number will be the answer to the multiplication problem. It is called the
**product**. - The second person multiplies the two uncovered numbers (one in a circle, one in a square). These are the two
**factors**. It does not matter which of the factors is said first. 4 5 and 5 4 both equal 20.

4 5 = 0 and 5 4 = 0 are called**turn-around facts.** - Separate the facts into three piles: Facts I Know Quickly, Facts I Can Figure Out, and Facts I Need to Learn.
- Discuss how you can figure out facts that you do not recall right away. Share your strategies with your partner.
- Practice the last two piles again and then make a list of the facts you need to practice at home for homework.
- Circle the facts you know quickly on your
*Multiplication Facts I Know*chart in the*Student Activity Book.*Remember that if you know one fact, you also know its turn-around fact. Circle both on your chart.