Expressions
Is the following an expression?
3y-8c=
No, because it has an equal sign.
What is the variable in the one-step equation below:
r/12=2
r
What is the order of operations?
Parenthesis, Exponents, Multiplication & Division, Addition & Subtraction (PEMDAS)
What does variable mean in math?
A symbol for a value we don't know yet.
The letter in the equations/expression.
The unknown value.
Is the following an expression?
4x+32-5c
Yes, because it does not have an equal sign.
What is the inverse operation we need to do in the expression below?
x+5=10
-5
What step should we do first in the following?
(4-6)^2 +15
Parenthesis
What does inverse operation mean?
Opposite.
Evaluate the following expression:
x=8 and y=8
4x+y-15
25
What is the operation of the following term?
16x
Multiplication
If multiplication and division have at the same time; how do we know which one to do first?
We solve them left to right.
What is the difference between an expression and an equation?
Expressions do not have equal signs.
Equations have equal signs.
Evaluate the following expression:
n=-12 p=8
15(n-3p)
15(-12-3•8)
15(-12-24)
15(-36)
-540
Solve for t:
-19+x=40
59
What should we simplify first in the following expression?
2/(3*x^2)
x^2
What does evaluate mean?
To find a numerical answer to an expression.
Evaluate the following expression:
p=8 and n=-12
(-2p-n)^3
(-2•8-(-12))^3
(-16+12)^3
(-4)^3
-64
Solve the following expression for g:
g/20=4
80
Use the order of operation to simplify the following:
(10-2^2)/(3*2^3-21)
2
What kind of equation is the following:
x-15=30
One-Step equation.