Variables and Expressions
Write an expression for 5 more than a number n
n + 5
Name the property: 7 + 9 = 9 + 7
Commutative of Addition
Expand: 3(x+4)
3x+12
Combine like terms: 4x + 3x
7x
Add: (2x + 3) + (4x + 1)
6x + 4
Evaluate 3x + 7 when x = 4
19
Name the property: 3x(4x5) = (3x4)x5
Associative of Multiplication
Expand: 5(2x - 3)
10x - 15
Combine like terms: 5y + 2 - 3y
2y + 2
Subtract: (5x + 7) - (2x + 3)
3x + 4
Write an expression for a number y decreased by 9
y - 9
Use a property to write an equivalent expression for
6 + (2 + 8)
Either (6 + 2) + 8 OR 6 + (8 + 2)
Expand: 6(3x + 2)
18x + 12
Factor: 6x + 18
6(x + 3)
Add: (3x - 5) + (2x + 9)
5x + 4
Evaluate 2a2 when a = 5
50
Compute mentally using a property: 27 x 4
108
4(20) + 4(7) = 80+28
Expand: -2(3x + 5)
-6x - 10
Combine like terms: 3x + 4y - x + 2y
2x + 6y
Subtract: (7x + 4) - (3x - 2)
4x + 6
Evaluate 4x - 3y when x = 6 and y = 2
18
Name the property: 12 x 1 = 12
Compute mentally using the Distributive Property:
7 x 98
7(90) + 7(8) = 630 + 56 = 686
Factor: 12x - 8
4(3x - 2)
Simplify: (2x + 3) + (x - 8) - (4x + 1)
-x - 6