1. 8TH GRADE
MATH STAAR
REVIEW

2. PLEASE REMEMBER!!
You must TRY each problem!
Underline important statements!
Bubble as you go
DO YOUR BEST!!!

3. Order of Operations P E M D A S
Parenthesis, Exponents, Multiply or Divide, Add or Subtract
PLEASE EXCUSE MY DEAR AUNT SALLY

4. Tear it out! WRITE on it! USE IT!
Formula Chart
Tear it out! WRITE on it! USE IT!
Perimeter
Volume
Customary Measurement
Metric Measurement
Area
Surface Area

5. Remember AREA is squared To the 2nd power n x n VOLUME is cubed
to the 3rd power
n x n x n
SQUARE ROOT
Find what number can be multiplied by itself

6. Dimensions
Perimeter and Circumference are 1 dimension
Area is 2 dimensions
Volume is 3 dimensions
Scale factor that effects dimensions is multiplied to EACH dimension!
New Perimeter is SF
New Ares SF2
New Volume SF3

7. a²+ b² = c² PYTHAGOREAN THEOREM FORMULA (Right Triangle) C
a and b are sides that form right angle
c is the hypotenuse
TOTAL DEGREES OF A CIRCLE
is 360 degrees
360
SUM OF THE INTERIOR ANGLES
of a triangle is 180 degrees
180

8. ADD & SUBTRACT FRACTIONS
Write the problems vertically
Find a common denominator
Add numerators only
Reduce answers to lowest terms
3 = 9
4 =12
2 = 8
3 =12
17 = 5 + 1

9. Denominator x Denominator
MULTIPLY FRACTIONS
Write horizontally
Numerator x Numerator
Denominator x Denominator
Reduce to lowest terms
4 x 6 = 24 = 3
5 x 8 = 40 = 5

10. DIVIDE FRACTIONS Write horizontally Remember there is no division
Find the reciprocal (flip it) of the 2nd fraction
and multiply (KCF – Keep Change Flip)
Reduce to lowest terms
7 . 15
9 ‘ 12
7 x 12 = 54 = 3
9 x 15 = 135 = 5

11. When to Use Proportions
If in doubt, try proportions
Comparing two things
(miles/gallons)
($ to feet)
(meters per second)
Rates/Unit Rates
Similar Figures
Converting Units of Measure
Percents %
Probability Predictions

12. To solve any percent or comparison problem:
Out of 100
% of 100
To solve any percent or comparison problem:
write as a proportion.

13. Percent of a Number DISCOUNT = Rate(%) X Original price
Part = % Whole or Is = % Of
DISCOUNT = Rate(%) X Original price
FINAL COST = Original price - DISCOUNT
SALES TAX=Rate(%) x Price
TOTAL COST= Price + SALES TAX

14. Divide the denominator into the numerator
FRACTION TO DECIMAL
Divide the denominator into the numerator
TOP DOG in the HOUSE!
.75 3 4
4 3.00

15. PERCENT TO A FRACTION Place the percent over 100
Reduce to Lowest terms
42% = 42 = 21

16. CHANGE DECIMAL TO A PERCENT
Move the decimal 2 places to the
right and add a % sign
(Dr. Pepper – DP)
(Decimal to Percent)
.35 =
35%
.354 =
35.4%

17. MEAN MEDIAN MODE Your ‘mean’ teacher will average your grades.
*Don’t use with an outlier
MEDIAN
Least to Greatest!
The ‘middle’ number in an ordered list of numbers.
*Use Median when you have an outlier
MODE
The number that appears the ‘most’.

18. INTEGER RULES Adding Integers 4 + 5 = 9 -4 + -5 = -9 4 + -5 = -1
Positive + Positive = Positive
= -9
Negative + Negative = Negative
= -1
= 1
Positive + Negative or
Negative + Positive
You subtract and take the sign of the larger number.

19. Remember – Identify the sign of each number
Subtracting Integers
Remember – Identify the sign of each number
Then you need to follow
the addition rules for integers.
*remember two negatives swoosh
To make a positive
-5 - (-7)
= 2

20. Positive x Positive = Positive Positive / Positive = Positive
MULTIPLY & DIVIDING INTEGERS
Product/Quotient of like signs is positive
Positive x Positive = Positive
Positive / Positive = Positive
5 x 6 = 30
= 5
Negative x Negative = Positive
Negative / Negative = Positive
-4 x -7 = 28
= 4
Product/Quotient of unlike signs is negative
Positive x Negative = Negative
Negative / Positive = Negative
6x-7 = -42
= -6

21. < less than > greater than
REMEMBER THESE WORDS! V E R T I C A L
GOES UP
Increase
< less than
> greater than
Decrease
GOES DOWN
HORIZONTAL

22. Here’s
THE PLAN
to help you
pass the
MATH STAAR!!

23. Concentrate on the problems you know
how to solve first.
Key words are useful.
Leave the harder problems for last.
Do not become frustrated.
Eliminate extra information!

24. After working each problem circle the answer you have selected in
Use process of elimination to help narrow your answer choices. Choose the answer that is better than the others.
After working each problem circle
the answer you have selected in
your test booklet and BUBBLE
YOUR SCANTRON

25. When you are finished working all
the problems, double check your work.
Make sure you circled an
answer in your test booklet and
MARKED YOUR ANSWER SHEET.
Rework any problems you
had concerns about.

26. ***Mark your scantron very carefully!!!!***
Last But Not Least --
***Mark your scantron very carefully!!!!***
Make sure each test question has been marked on your answer document
Try not to make any mistakes in marking
your scantron. If you have to erase be
sure to erase the mark completely.

27. YOU CAN DO THIS! You have worked diligently for this day!
Take a deep breathe,
Relax,
PASS THE STAAR!