MATH STAAR

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MATH STAAR
8TH GRADE
REVIEW
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PLEASE REMEMBER!!

• You must TRY each problem!
• Underline important statements!
• Bubble as you go
• DO YOUR BEST!!!

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Order of Operations
P E M D A S
Parenthesis, Exponents, Multiply or Divide, Add
or Subtract
PLEASE EXCUSE MY DEAR AUNT SALLY
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Formula Chart
Tear it out! WRITE on it! USE IT!
Perimeter
Volume
Customary Measurement
Metric Measurement
Area
Surface Area
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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

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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

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PYTHAGOREAN THEOREM FORMULA (Right Triangle)
C
a² b² c²
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
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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
12 12

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MULTIPLY FRACTIONS

Write horizontally
Numerator x Numerator Denominator x
Denominator
Reduce to lowest terms
4 x 6 24 3 5 x 8 40 5

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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
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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

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Percent
Out of 100 of 100
To solve any percent or comparison problem write
as a proportion.
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Part Whole 100 orIs
Of 100
Percent of a Number
DISCOUNT Rate() X Original price FINAL COST
Original price - DISCOUNT
SALES TAXRate() x Price TOTAL COST Price
SALES TAX
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FRACTION TO DECIMAL
Divide the denominator into the numerator
TOP DOG in the HOUSE!
.75
3 4
4 3.00
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PERCENT TO A FRACTION
Place the percent over 100
Reduce to Lowest terms
42 42 21 100 50
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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

35.4
.354
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MEAN
Your mean teacher will average your
grades. Dont 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.
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INTEGER RULES
Adding Integers
4 5 9
Positive Positive Positive
-4 -5 -9
Negative Negative Negative
4 -5 -1 5 -4 1
Positive Negative or Negative Positive You
subtract and take the sign of the larger number.
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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) -5 7 2
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MULTIPLY DIVIDING INTEGERS Product/Quotient of
like signs is positive
Positive x Positive Positive Positive /
Positive Positive
5 x 6 30 30 6 5
Negative x Negative Positive Negative /
Negative Positive
-4 x -7 28 -28 -7 4
Product/Quotient of unlike
signs is negative Positive x Negative
Negative Negative / Positive Negative
6x-7 -42 -42 7 -6
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REMEMBER THESE WORDS!
V E R T I C A L
GOES UP
Increase
lt less than gt greater than
Decrease
GOES DOWN
HORIZONTAL
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Heres THE PLAN to help you pass the MATH
STAAR!!
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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!
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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
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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.
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• 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.

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YOU CAN DO THIS!

• You have worked diligently for this day!
• Take a deep breathe,
• Relax,
• PASS THE STAAR!