Intro to algebaic expressions and equations

Solving Equations

Students use algebra to solve equations (of the form px + q = r and p( x + q) = r, where p, q, and r are specific rational numbers); using techniques of making zero (adding the additive inverse) and making one (multiplying by the multiplicative inverse) to solve for the variable.

Expressions

• Expressions are Numbers, symbols and operations (such as + and ×) grouped together that show the value of something.

Multiple Select

Identify the Additive Property

• - 4 - 4

• 4 + 4

• - 4 - (-4)

Multiple Choice

2 - 4

• 2

• -8

• 6

• -2

Multiple Choice

-9 + (-5)

• -14
• 14
• -4

Multiple Choice

-15 - 3

• 12

• -12

• -18

• 18

Multiple Choice

Identify the multiplicative Property

• 12 x 12

• 12 x 1/12

• -12 x 12

Multiple Choice

7 * (1/7) = 1

• Multiplicative Identity

• Commutative Property

• Multiplication Property of Equality

• Multiplicative Inverse

Multiple Choice

2/3 x ____ = 1

• -2/3
• 3/2
• -3/2
• -1

Open Ended

Solve the following:

2x + 8 = 18

Open Ended

Evaluate the following:

6- 8b = 38

Open Ended

Evaluate:

-2v + 9 = 25