Cheatography

# Math Basics Cheat Sheet (DRAFT) by 123456789ABCDEFGH

ELA Math Science Social Studies

This is a draft cheat sheet. It is a work in progress and is not finished yet.

### Negatives

 Adding Subtra­cting Multip­lying Dividing (+)+(+­)=(+) (+)-(+­)=(+) (+)x(+­)=(+) (+) ÷(+)= (+) (-)+(-­)=<(-) (-)-(-­)=(­-)+(+) (-)x(-­)=(+) (-) ÷(-)= (+) (+)+(-­)=(­+)-(+) (+)-(-­)=(­+)+(+) (+)x(-­)=(-) (+) ÷(-)= (-) (-)+(+­)=(­+)+(-) (-)-(+­)=(­+)+(+) (-)x(+­)=(-) (-) ÷(+)=(-)

### Properties

 Commut­ative Associ­ative Identity Inverse commut­ative property states that the numbers on which we operate can be moved or swapped from their position without making any difference to the answer associ­ative property is a property of some binary operations identity is an equality relating one mathem­atical expression to another Inverse means the opposite in effect

### Fractions

 Adding Subtra­cting Multip­lying Dividing Find a common denomi­nator. Add the numerators (and keep the denomi­nator) Simplify the fraction. Make sure the bottom numbers (the denomi­nators) are the same. Subtract the top numbers (the numera­tors). Put the answer over the same denomi­nator. Simplify the fraction (if needed) Multiply the two numera­tors. Then multiply the two denomi­nators. Simplify the new fractions. The first step to dividing fractions is to find the reciprocal (reverse the numerator and denomi­nator) of the second fraction. Next, multiply the two numera­tors. Then, multiply the two denomi­nators. Finally, simplify the fractions if needed.

### Tools

 Pi 3.1415­926­535­897­932­384­626­433­832­79502 Place Value M HTH TTH T H T O . 1/10 1/100 1/1000 Order of Operation Brackets, Parent­heses, Exponents, Add-Su­btract, Multip­ly-­Divide Area B·H=A Volume B·H·W=V Prime (1-100) 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97... Composite (1-100) 4, 6, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30, 32, 33, 34, 35, 36, 38, 39, 40, 42, 44, 45, 46, 48, 49, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 63, 64, 65, 66, 68, 69, 70, 72, 74, 75, 76, 77, 78, 80, 81, 82, 84, 85, 86, 87, 88, 90, 91, 92, 93, 94, 95, 96, 98, 99, 100 Square Root x2 = y Denomi­nator Bottom number of a fraction Numerator Top number of a fraction