The operation is addition.
The inverse operation is subtraction
x = 32
100
6 ^ 1
6
100
What is an expression?
a phrase, a thought, no equal sign
200
18 decreased by a number
18-x
200
Evaluate x • y when x = 2, y = 7
14
200
x ÷ 4 = 3
The operation is division.
The inverse operation is multiplication.
x = 12
200
7 ^ 2
49
200
What is an equation?
It is a complete thought, has a equal sign
300
The difference of a number and 31
x - 31
300
Evaluate 21 ÷ x - 1 when x = 7
2
300
x + 32 = 64
The operation is addition.
The inverse operation is subtraction.
x = 32
300
(7/11) ^ 1
(7/11)
300
What is a coefficient?
A constant/a number that is placed before the variable
400
1/2 of a number
(1/2) x
400
Evaluate 8 • x + 25 when x = 7
81
400
x + 39 = 48
The operation is addition.
The inverse operation is subtraction.
x = 9
400
(2/3)^2
(4/9)
400
What is a variable?
x, n, t, a...
or a symbol of a number we don't know yet.
500
2/3 of a number
(2/3) x
500
Evaluate 8 • x - y when x = 3, y = 5
19
500
x ÷ 12 = 7
The operation is division.
The inverse operation is multiplication
x = 84
500
(-2)^2
4
500
What are inverse operations?
Inverse operations are opposite operations that undo each other. Addition and subtraction are inverse operations. Multiplication and division are inverse operations.