1. Variables and Expressions

2. Vocabulary
Variable--A symbol, usually a letter of the alphabet, such as the letter n, that is used to represent a number.
Algebraic Expression (AKA--Variable Expression)--An expression, such as n – 5, that consists of one or more numbers and variables along with one or more arithmetic operations. (Note: No equal sign)
Numerical Expression -- An expression, such as 10-4, that consists of only numbers and one or more arithmetic operations
Constant--A specific number whose value does not change

3. n – 7 + r What kind of expression is this?
Algebraic Expression or Numerical Expression
Name a variable.
What is the 7 called in this expression?

4. Videos

5. How Do You Describe an Algebraic Expression?
Variable Expression
Meaning
Operation

6. State the meaning of the variable expression and name the operation

7. 2 times w; Multiplication 7 divided by n; Division 6 plus p; Addition
Answer: State the meaning of the variable expression and name the operation
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8 minus x; Subtraction
2 times w; Multiplication
7 divided by n; Division
6 plus p; Addition
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8. Write the expression 1. 7 plus b 2. 5 more than y 3. 3 minus r
4. 2 less than p
5. x divided by 10
divided by m
7. 13 times r