Addition
x - 2 = 6
What is 8
9x = 27
3
y ÷ 6 = 2
12
This is a letter that represents an unknown value in an equation.
Variable
d - 7 = 9
16
7x = 63
9
x ÷ 4 = 14
56
This means the opposite.
Inverse
n + 8= 14
6
k - 83 =121
204
5e = 400
80
x ÷ 6 = 6
36
This is a math sentence this does have an equal sign.
Equation
x + 36 = 100
64
x - 327 = 665
992
11x = 275
25
a ÷ 13 = 28
364
This is a math sentence that does not have an equal sign.
Expression
c + 27= 56
29
a - 163 = 200
363
21y = 756
36
x ÷ 15 = 8
1200
These are called __________ in math.
+: Addition
-: Subtraction
x: Multiplication
÷: Division
Operations