Vocabulary
A letter that is used to present a number but usually an unknown number.
Variable
(23 - 4) / 2 =
2
Evaluate the expression when x = 13
x - 6 =
7
Evaluate the expression when x = 3 and y = 2,
x + 2 + y =
7
What are you supposed to substitute inside of?
Parenthesis
Rules to follow when more than one operation is used in an expression or equation.
Order of operation / PEMDAS
(6 + 8) / 7 x 3 =
6
Evaluate the expression when b = 4
b + 11 - 7 =
8
Evaluate the expression when x = 4 and y = 3,
2xy - 2 =
22
How do you read this expression? 6c / 4
6 times c divided by 4
Means to do repeated multiplication of a base number.
Powers
(102 - 32) x 6 - 3 x 2 =
540
Evaluate the expression when y = 3
12 / y + 3 =
2
Evaluate the expression when a = 5 and b = 6,
(a + 19) / b + 76 - 8
72
How do you solve this problem? 20 / 4(2)
From left to right.
A small number written above and to the right of the other number (base) that tells you how many times to multiply that number by itself.
Exponent
102 - 32 x 6 - 3 x 2 =
40
Evaluate the expression when x = 9
x / (9 - 6) =
3
Evaluate the expression when x = 2 and y = 9,
x4 + y/ 3 + (6 - x) / 2 =
21
What does PEMDAS stand for?
Parenthesis, Exponents, Multiplication, Division, Addition, Subtraction
The number placed in front of the variable (letter).
Coefficient
(12 + 12 - 32) x 4 / 2 =
30
Evaluate the expression when y = 6
(32 + 16) / y + 2 (y - 2)
16
Evaluate the expression when x = 8 and y = 10,
(2x / (14 - y))3 - (y3 / 5x) =
39
Which is the constant in: 3x + 6 - 9y
6