Math Lesson 6.4, Fact Triangles

1. Math Lesson 6.4, Fact Triangles Student Math Journal 2, Activity Sheets 9 and 10 Teaching Masters 170, 173, 174 Math Journal 2, Student Pages 116 and 117 Game Master 343 Home Link 171 & 172

2. Math Message: Write the fact family for this domino: Home Link 6.3 Follow Up: Record the fact families for these dominoes.

3. 10 +,- 6 4 6 + 4 = 10 4 + 6 = 10 10 - 4 = 6 10 - 6 = 4

4. Fact Triangle 10 +,- 6 4 Fact Triangles will be used to practice basic addition and subtraction facts. The word fact has an everyday meaning and a mathematical meaning. Now, use your own set of Fact Triangles and generate fact families with your partner.

5. Beat the Calculator Materials: a calculator; a penny or a random-number generator (optional); 1 Fact Power Table (optional) Number of Players: 3 Directions: One player is the "Caller," a second player is the "Calculator," and the third is the "Brain." Players trade roles every 10 turns or so. Brain Caller Calculator

6. Playing the Fact Power Game 2 players, or small groups For each new game, use the game mat of one of the players. Directions: Players place their markers on START. They take turns rolling a die and moving their markers the correct number of spaces across the rows, as indicated by the arrows on the game mat.

7. Game Master, Fact Power Game Mat Student Page, Math Journal 2, page 116 Student Page, Math Journal 2, page 117 Writing and Reasoning How do you know what to write on the name-collection box?

8. Write this number in pencil: 10 For constructing fact families, roll two different colored dice. Record each number sentence using the corresponding colors. +,- Write this number in blue: Write this number in red: 6 4

9. For the previous fact triangle, your number sentences would look like this: 6+4 = 10 4 +6 = 10 10- 4 = 6 10 - 6 = 4 Use colors that correspond to the available dice.

10. +,- ___ + ___ = ___ ___ + ___ = ___ ___ - ___ = ___ ___ - ___ = ___ 7 7 8 9 8 0 9 0 1 2 3 4 1 2 3 5 4 5 6 6

11. Make a fact family house. Remember, only numbers on the roof can live in the house of number sentences. 4, 5, 9 ___ + ___ = ___ ___ + ___ = ___ ___ - ___ = ___ ___ - ___ = ___

12. Make a fact family house. Remember, only numbers on the roof can live in the house of number sentences. 3, 5, 8 ___ + ___ = ___ ___ + ___ = ___ ___ - ___ = ___ ___ - ___ = ___

13. Make a fact family house. Remember, only numbers on the roof can live in the house of number sentences. 3, 7, 10 ___ + ___ = ___ ___ + ___ = ___ ___ - ___ = ___ ___ - ___ = ___

14. Math Masters 172, 173, 174