Expressions and Equations

1
Expressions and Equations

• You will learn how to simplify expressions and
  write equations

2
Expression

• An expression is a combination of numbers,
  operation signs, and parentheses.
• An algebraic expression does NOT have an equals
  sign

48 (17 1) 12 (6 8) (9 - 4) 48 (7 -4)
3
3
Simplify

• When you simplify an expression, you perform
  the operations and tell what it equals.

Always do whats in the parentheses first.
48 (17 1) 12 48 18 12 30 12 18
4
Simplify the following expression

(6 8) (9 - 4) 14 5 19
5
Simplify the following expressions
15

• (12 6) 3
• 9 (18 9) 6
• (8 2) (3 4)
• (21 3) (4 2) (3 5)

24
17
20
6
Equations
An equation shows that two expressions are equal
to each other. An equation uses an equals sign
between the two expressions.

48 (17 1) 12 (6 8) (9 4) - 1