1. Lesson by Vi Thai

2. Properties Unit Middle School Middle School This lesson on the properties of addition should come after students have done a quick review of addition. This power point presentation is to accompany the introductory lesson. This lesson on the properties of addition should come after students have done a quick review of addition. This power point presentation is to accompany the introductory lesson.

3. Commutative Property of Addition a + b = _____b + a Frogs + Flies = ___________ Shoes + Socks = _____________Socks + Shoes Algebraically: 5 + 3 = _____3 + 5 Numerically: 6 + 8 = _____8 + 6 8 = 8 14 = 14 Flies + Frogs

4. Associative Property of Addition (Chickens + Ducks) + Horses = _________________________Chickens + (Ducks + Horses) (a + b ) + c = ____________ (Keyboard + Mouse) + Monitor = _________________________Keyboard + (Mouse + Monitor) Algebraically:a + (b + c) (3 + 5 ) + 7 = ____________ Numerically:3 + (5 + 7) 15 = 15 (2 + 7 ) + 5 = ____________ 2 + (7 + 5) 14 = 14

5. Distributive Property Multiplication over Addition 5 * (Apples + Bananas) = 5 Apples + 5 Bananas 5 * (a + b ) = ________ Algebraically:5a + 5b 5 * (3 + 4) = _________ 5(3) + 5(4) = ______ 15 + 20 = ___35

6. Let’s do a quick review! In the next few slides, you will be asked to complete each question with the correct answer. Choose a, b, c or d. Good luck!

7. b + a a + b a – b b – a The Commutative Property States that: The Commutative Property States that: a + b = a + b = a. b.d. c.

8. Correct! The Commutative Property states: The Commutative Property states: a + b = b + a Go to the next question! Go to the next question!

9. Sorry! Your answer is incorrect! Please try again! Your answer is incorrect! Please try again!

10. (a + b) - c (a + b + c) The Associative Property States that: The Associative Property States that: a + (b + c) = a + (b + c) = (a + c) + b (a + b) + c a. b.d. c.

11. Correct! The Associative Property states: The Associative Property states: a + (b + c) = (a + b) + c Go to the next question! Go to the next question!

12. Sorry! Your answer is incorrect! Please try again! Your answer is incorrect! Please try again!

13. The Distributive Property states: The Distributive Property states: 2 * (x + y) = 2x + 2y 2x – 2yx + 2y 2x + y a. b.d. c.

14. Sorry! Your answer is incorrect! Please try again! Your answer is incorrect! Please try again!

15. Correct! The Distributive Property states: The Distributive Property states: 2 * (x + y) = 2x + 2y Great job! You have completed the review! Great job! You have completed the review! END