What is a variable? Give an example of a variable.
A variable is a letter or unknown number.
Example: x, n, c
100
What operation should be used for increased by?
addition
100
a number decreased by 8
n - 8
100
–3h – 2h + 6h + 9
-3h, -2h, 6h
9
100
7f – 2f
5f
200
Show me three examples of a term.
5, 9, -9, 8n, 3c
Answers will vary.
200
What operation should be used for decreased by?
subtraction
200
four times a number
4n or 4 x n
200
2m + 3m – m
2m, 3m, -1m
200
5c + 8c
10c
300
What is the difference between an expression and an equation?
An expression you do not solve.
An equation has an equal sign, so you can solve.
300
Name all four operations
Addition
Subtraction
Multiplication
Division
300
the product of 12 and t
12t or 12 x t
300
–8p + 6p – 2
-8p, 6p
-2
300
7m – 5m – 6
2m - 6
400
What does it mean to simplify with expressions?
Combine like terms
400
What operation should be used for half of something?
Division
400
3 less than 5 times a number
5n - 3 or (5 x n) -3
400
8k + 3 + 4k
8k, 4k
3
400
6m – 7 + 2m + 7
8m + 0
500
What does evaluate mean?
To solve.
500
What operation would be used when a number and variable are next to each other...
For example: 9n <---- what operation is used when they are right next to each other?