8th Grade Math Mcas Reference Sheet
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1
2Grade 8 DESE approved Reference Sheet
th
8
Grade Math MCAS Reference Sheet
Conversions
Decimal to Percent….Move decimal
Decimal
To add or subtract, line up decimals.
Percent to Decimal….Move decimal
Decimal to Fraction….Write percent over
To multiply, count up the number of
100 and simplify
decimal points and apply to product.
To divide, make the dividend a whole
number and do the same for the divisor.
PEMDAS(Order of Operations)
Measurement
Integers
1 ft. = 12 in.
Absolute Value…Always POSITIVE
1 yard = 12 ft. / 1 yard = 36 in.
Negative + Negative = NEGATIVE
1 mile = 5280 ft.
Negative + Positive = The sign of the larger
number
1 centimeter = 10 millimeters
1 meter = 100 centimeters
Multiplication:
1 meter = 1, 000 millimeters
Same Sign = Positive
1 kilometer = 1,000 meters
Different Sign = Negative
Finding LCD
Multiply each denominator by 1, 2, 3, etc.
What
you
want
(P) Event =
until you find the smallest common #.
Total
you
have
Event = what you want
Proportion
a
c
=
equals ad = bc
b
d
Approved 4/2014
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