Variables in Math

Math X Pre-Alg Variables

Variables

What are variables

Variables

• Any letters or symbols that represents an unknown number

• Ex. x+2=3 x=1, there for 1+2=3

Multiple Choice

True or false

Variable are any letters or symbols that represents a known number.

• True

• False

Algebra

• the part of mathematics in which letters and other general symbols are used to represent numbers and quantities in formulae and equations

• this is where variables come in

• Ex. x+15=23, x+y-2=10 etc.

• It is very helpful in terms of organizing the equation, and strategy.

Multiple Choice

What is the variable in 3x - 5

• x

• 5

• 3

Multiple Choice

In this expression what is the variable? 
5 + y 

• q
• +
• 5
• y

Multiple Choice

What are the variables in the following expression?

• 3, 4, 1 and 7
• z, x and y
• + and -
• 15

Multiple Choice

5p + 4h - 2
Which are the variables? 

• 5p, 4h, 2
• 2
• p, h
• 5, 4

Multiple Choice

What are variables in math?

• Letters

• Numbers

• Expressions