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# Math Chea Sheet

Mathematics

Study Guide

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Math Cheat Sheet
Strategies:
Read a math question in chunks rather than straight through
– make notes or draw a picture as you read to help illustrate
the problem
Circle the actual question – make sure you note if there is a
not” in it, or if it asking for the opposite of what you have to
solve for.
Glance at the answer choices for clues – if they are
infractions, work in fractions; if they are in decimals, work in
decimals
If you are stumped, try a backdoor approach – try to plug in
Approximate when appropriate – if the question is asking for
45% of a number, look for an answer that is close to half of
the number
or just guess)
Percentages:
Remember this formula, and usually, you’ll be able to plug in
the numbers and solve for X
______ % of __________ = _____________
Here’s another way to remember:
___Part (is) = %___
Whole (of) 100

Conversion Table:
Decimal % Fraction
.25 25% ¼
.50 50% ½
.75 75% ¾
.10 10% 1/10
.20 20% 1/5
.40 40% 2/5
.60 60% 3/5
.80 80% 4/5
.333 30 1/3% 1/3
.666 66 2/3% 2/3
Factorial
If you are asked for “5 factorial,” it is 5x4x3x2x1.
Fractions
Multiplying:
½ x ¾ x 5/8 = 15/64
2 2/3 x 5/7 = 8/3 x5/5 = 40/ 21= 1 19/21
Cancellation:
8/9 x 3/16 = 1/9 x 3/2 = 3/18 = 1/6
Dividing:
½ ÷ 3 = ½ x 1/3 =1/6

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Review

Anonymous
Awesome! Perfect study aid.

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