6th Bronte & 6th Neruda

Quote: When you blame others, you give up your power to change.- Author Unknown

Objective: Use mathematical properties to find sums, differences, products, and quotients.

Activate Prior Knowledge:
Solve by using mental math.

1. d + 13 = 33
2. 25 - g = 17
3. 6m = 54
4. 9 = x ÷ 11

Variables are letters that represent numbers.

New Knowledge:

One way to find the sum or product mentally is to use a number property.

Commutative Property:

• Of Addition: Numbers can be added in any order without changing the sum.

Ex. 45 + 29 + 55 = 29 +45 +55

129 = 129

• Of Multiplication: Numbers can be multiplied in any order without changing the product.

Ex. 5 x 3 x 8 = 5 x 8 x 3

120 = 120

Associative Property:

• Of Addition: Addends can be grouped differently; the sum is always the same.

Ex. (45 + 29) + 55 = 45 + (29 +55)

129 = 129

• Of Multiplication: Factors can be grouped differently; the product is always the same.

Ex. (5 x 3 ) x 8 = 5 x (3 x 8)

120 = 120

Distributive Property:

5 (8 + 2) = (5 x 8) + (5 +2)

5(10) = 40 + 10

50 = 50

Application: p.38(3-18) We are going to continue tomorrow

Reflection:Properties help us…

Reinforcement tomorrow in 6th Bronte from 2:45 - 3:25 p.m.