PEMDAS
Explain what the acronym stands for...
Parentheses, Exponents, Multiplication, Division, Addition, Subtraction
Explain what an exponent is.
The small raised number that tells how many times the base is multiplied by itself.
What is "x"?
A variable
Coefficient
The number next to a variable
63
216
What is the first step in this problem?
3 x 9 + 7
3x9, Multiplication, or 3 times 9
Explain what a base is.
The number being multiplied by itself.
What is an expression?
A group of numbers, variables, and operations (NO EQUAL SIGN).
Isolate the variable
Get x alone on one side.
20 divided by (5 times 2)
2
What do you do first in a problem?
Multiply or divide?
Always go left to right/Whichever is first
Give an example of SQUARED.
Answers will vary:
53
102
Give an example of a constant
A number with no variable.
Example: 8, 9, 2
Cubed
A number raised to the power of 3.
43 x 52=
1, 600
Solve: (50 minus 10) divided by 4 times 7
(50-10)/4x7
=(40)/4 x 7
=(10) x 7
=70
Solve 53
5*5*5=
125
Solve for x: x+7=12
x+7=12
-7 = -7
x= 5
Equation vs Expresion
Equation has =, Expression doesn't.
3(2x+4)=18
x=1
Create your own mnemonic device for PEMDAS (It must make sense!)
Answers will vary...
Pandas Eat Muffins During Afternoon Snacks
Pizza Every Monday Donuts After School
Penguins Enjoy Many Delicious Arctic Snacks
8*8*8*8
Solve for x: 7x+9=23.
7x+9=23
-9 = -9
7x = 14
divide by 7 both sides
x=2
Standard form
The final value after simplifying.
Example: 53 = 125
4(x+2)=3x+10