Multiplication+Properties

Multiplication properties help when you use mental math.
==== **Stacy has 8 shelves. She has 5 CDs on each shelf.** **Bjorn has 5 shelves. He has 8CDs on each shelf.** **Who has more CDs?**  ====

**So, Stacy and Bjorn have the same number of CDs. **

**__QUESTIONS__**


 * **Write the name of the multiplication property used in each number sentence.**
 * 1) 2 x (4 x 3) = (2 x 4) x 3
 * 2) 5 x 4 = 4 x 5
 * 3) (7 x 3) x 8 = 7 x (3 x 8)
 * Vanessa:
 * 1) associative property of multiplication
 * 2) commutative property of multiplication
 * 3) associative property of multiplication

[Dalia] 1) associative, 2) communicative, 3) associative.

Nasser:

1) Associative property of multiplication 2) Commutative property of multiplication 3) Associative property of multiplication

Jida: 1) Associative property 2)Commutative property 3)Associative property
 * **Copy and complete the equation. Identify the property used.**
 * 1) 4 x 6 = 6 x **_**
 * 2) 5 x (4 x 6) = (5 x _ ) x 6
 * 3) _ x 7 = 7 x 4
 * <span style="color: #00ff00; font-family: 'Comic Sans MS',cursive;">Vanessa:
 * 1) <span style="color: #00ff00; font-family: 'Comic Sans MS',cursive;">4 x 6 = 6 x 4 ; commutative property of multiplication
 * 2) <span style="color: #00ff00; font-family: 'Comic Sans MS',cursive;">5 x (4 x 6) = (5 x 4) x 6 ; associative property of multiplication
 * 3) <span style="color: #00ff00; font-family: 'Comic Sans MS',cursive;">4 x 7 = 7 x 4 ; commutative property of multiplication

[Dalia] 1) communicative: 4 x 6 = 6 x 4, 2) associative: 5 x (4 x 6) = (5 x 4) x 6, 3) communicative: 4 x 7 = 7 x 4

Nasser:

1) 4 x 6 = 6 x 4 --> Commutative 2) 5 x (4 x 6) = (5 x 4) x 6 --> Associative 3) 4 x 7 = 7 x 4 --> Commutative

Jida:

1) 4x6=6x__4__ commutative 2) 5x(4x6)=(5x__4__)x6 associative 2) __4__x7=7x4 commutative


 * <span style="color: blue; font-family: Verdana,sans-serif;">**Karl has 7 dimes in each of 6 rows. Sue has 6 dimes in each of 7 rows. Who has more money? Show your work.**
 * <span style="color: #00ff00; font-family: 'Comic Sans MS',cursive;">Vanessa:
 * 1) <span style="color: #00ff00; font-family: 'Comic Sans MS',cursive;">Karl: 7 x 6 = 42 & Sue: 6 x 7 = 42 ; both have the same amount of money.

[Dalia]

Karl Sue 7 (dimes) x 6 (rows) I 6 (dimes) x 7 (rows) 7 x 6 I 6 x 7 (communicative property)

Both have the same amout of money: 42 dimes.

Nasser:

Karl 7 x 6= 42 dimes Sue 6 x 7= 42 dimes

7 x 6 = 6 x 7 (Commutative)

Both have 42 dimes.

Jida:

1) Sue has : 6x7 = 42 Karl has : 7x6= 42  they both have 42 dimes.