1. BRAINSTORM What KEYWORDS do you know for the four operations???
ADDITION
SUBTRACTION
MULTIPLICATION
DIVISION
Sheet

2. 1-1 Variables & Expressions
Vocabulary:
- LETTER that stands for a #
Variable
Constant
Expression
Evaluate
- NUMBER that doesn’t change
- phrase using VARIABLES, NUMBERS, and OPERATIONS
- Replacing each variable with a number (Substituting)

3. Ex #1: Name the variable, constant and operation(s).
A. x + 5
B. 2m C.
D. 3a - 1

4. Ex #2: Write an expression for the word phrase.
A. the sum of twice a number and 7
B. eight less than y
C. half of g
D. twice the sum of a number and 12

5. Ex #3: Evaluate (one variable)
A. 4y – 15 for y = 6
B. 3(x + 7) for x = 5

6. Ex #4: Evaluate (more than one variable)
A. 3ab for a = 2, b = 5 B.

7. YOU TRY! Write the expression for the word phrase.
1. the quotient of 12 and d
2. twice the difference of n and 4
Evaluate.
3. 2xy – z for x = 4, y = 3, and z = 1
4. 3(g + h) for g = 4 and h = 7

8. HOMEWORK
p.8 #32-37, 40-50