Hardin Middle School Math Cheat Sheets
[Pages:64]Name: __________________________________________ 7th Grade Math Teacher: ______________________________ 8th Grade Math Teacher: ______________________________
Hardin Middle School Math Cheat Sheets
You will be given only one of these books. If you lose the book, it will cost $5 to replace it.
Compiled by Shirk &Harrigan - Updated May 2013
Area Circumference
Alphabetized Topics
Pages 32 32
Place Value Properties
Comparing
23, 26
Proportions
Congruent Figures
35
Converting
14, 15, 23
Divisibility Rules
8
Equations
37, 38, 39
Flow Charts
Formulas Fractions
32, 33, 34 18, 19, 20, 21, 22, 23, 24
Geometric Figures
30, 31
Greatest Common Factor (GF or GCD)
22
Inequalities
40
Integers
18, 19
Ladder Method
22
Least Common
Multiple
22
(LCM or LCD)
Mean
11
Median
11
Mode
11
Multiplication Table
6
Order of Operations
16, 17
Percent
23, 24, 25, 26
Perimeter
32
Pythagorean Theorem R.A.C.E. Range Rates Ratios Rounding
Scale Factor
Similar Figures Slide Method Substitution Surface Area Symbols
Triangles
Variables Vocabulary Words Volume Word Problems
Pages 9, 10 12 22, 23, 24, 25, 26 36
41 11 25 25, 26 10
35
35 22 29 33 5
30, 36
29 43 34 41, 42
Table of Contents
Cheat Sheets Math Symbols Multiplication Table Types of Numbers Divisibility Rules Place Value Rounding & Comparing Measures of Central Tendency Properties Coordinate Graphing Measurement Conversions Metric Conversions Order of Operations Integers Fraction Operations Ladder/Slide Method Converting Fractions, Decimals, &
Percents Cross Products Ratios, Rates, & Proportions Comparing with Ratios, Percents,
and Proportions Solving Percent Problems Substitution & Variables Geometric Figures Area, Perimeter, Circumference Surface Area Volume Congruent & Similar Figures Pythagorean Theorem Hands-On-Equation Understanding Flow Charts
Pages
5 ? 42 5 6 7 8 9 10 11 12 13 14 15
16 ? 17 18 ? 19 20 ? 21
22
23
24 25
26
27 ? 28 29
30 ? 31 32 33 34 35 36 37 38
Solving Equations Mathematically
39
Inequalities
40
R.A.C.E. ? Answering Questions
41
Word Problem Cheat Sheet
42
Math Vocabulary
43 - End
3
4
Mathematic Symbols Cheat Sheet
+
Plus or Positive
Line AS
?
Minus or Negative
? *x
Multiplied by
Line segment AS Ray AS
? /
Divided by
Triangle ABC
= Equal to
NOT equal
Approximately equal to
Angle ABC Angle B Right angle
Congruent to
Perpendicular to
<
Is less than
>
Is Greater than
Is greater than or equal to
Perpendicular to
?
Degree
%
Percent
Sum
Square root of x
Is less than or equal to
Pi (3.14.159)
a/b a:b
Ratio of a to be or a divided by b or the fraction a/b
!
Factorial
xn
Nth power of x
(a, b) Ordered pair
Infinity
5
6
Types of Numbers ? Cheat Sheet
Prime Number ? A number that has exactly two (2) factors
Zero (0) and One (1) are neither prime nor composite because they only have one factor (itself)
Composite Number ? A number that has three (3) or more factors
Even Numbers ending in 0, 2, 4, 6, 8
Odd Numbers ending in 1, 3, 5, 7, or 9
7
Divisibility Rules
- Divisible by 2 ? All even numbers are divisible by 2. Even numbers end in 0, 2, 4, 6, or 8 and all are divisible by 2.
- Divisible by 3 ? If the sum of the digits is divisible by 3 so is the number. Add up the digits in the number, if the answer is divisible by 3 so is the number.
- Divisible by 4 ? Odd numbers are NEVER divisible by 4. Odd numbers end in 1, 3, 5, 7, or 9, so any number ending with one of this will NOT be divisible by 4.
Even numbers MAY be divisible by 4. To check, look at the last 2 digits of the number. If the number formed by the last 2 digits is divisible by 4, then the number is divisible by 4.
- Divisible by 5 ? If a number ends in a 5 or a zero then it is divisible by 5
- Divisible by 6 ? If a number is divisible by 2 AND 3, it is divisible by 6.
- Divisible by 9 ? ? If the sum of the digits is divisible by 9 so is the number. Add up the digits in the number, if the answer is divisible by 9 so is the number.
- Divisible by 10 ? Numbers that are divisible by 10 end in with a zero.
8
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