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What does PEMDAS stand for?
Please excuse my dear aunt Sally---
AND
Parenthesis, exponents, multiplication, division, addition, subtraction
Which is the variable and which is the coefficient?
5x
variable- x
coefficient- 5
How do I read these inequality symbols?
>, <, >, and <
greater than >, less than <, greater than or equal to >, and less than or equal to <.
Solve.
4 + (53 -20)
4 + (125 - 20)
4 + 105
109
Solve:
y - 8 = 4
y = 12
If they variable is less than the number, draw an arrow to the __________. If the variable is greater, draw and arrow to the _______________.
left, right.
What is the 2nd step in this equation?
12 + (9 - 2 x 3) / 3 =
12 + (9 - 2 x 3) / 3 =
12 + (9 - 6) / 3 =
12 + 3 / 3 =
To solve equations, you can use mental math, fact families, or ________ ____________ to isolate the variable on one side of the equals sign.
Inverse operation
Write 2 inequalities to match this situation:
You should study for your math test tonight for more than 20 minutes.
x > 20
20 < x
Solve:
32/8 + 7 x 2 - 32 =
32/8 + 7 x 2 - 32 =
32/8 + 7 x 2 - 9 =
4 + 7 x 2 - 9 =
4 + 14 - 9 =
18 -9 =
9
Solve:
x/5 + 4 = 10
x/5 + 4 = 10
-4 = -4
x/5 = 6
x 5 = x 5
x =30
Draw number line here:
3 + [6 (11 + 1 - 4)] / 8 x 2 =
3 + [6 (11 + 1 - 4)] / 8 x 2 =
3 + [6 (8)] / 8 x 2 =
3 + 48 / 8 x 2 =
3 + 6 x 2 =
3 + 12 =
15
What is the difference between an equation and an expression?
An equation has an equals sign, and an expression does not --->
4x + 3 = 23 VS. 4x + 3
Solve and graph:
8 > 5 + x
8 > 5 + x
-5 > -5
3 > x
Number line here: