# Math

## By Allie J.

## Adding fractions Quick and easy steps

1. Find the common demoinater

2. Add the numerators, the denominators stay the same

3. Simplify, if possible

## Example

1/2 + 3/4 common denominator is 2 so it is 1/2+1/2 which equals 2/2 simplified to 1

## Subtracting fractions

1. Find the common denominator

2. Subtract the numerator keep the denominator the same

3. Simplify, if possible

## Example

3/4-1/2=1/4

## Multiplying fractions quick and easy steps

1. Multiply across :-) (numerator AND denominator)

2. Simplify if possible

## Dividing fractions quick and easy steps

1. Flip the 2nd factor

2. Change the division problem to a multiplication problem

3. Multiply across

## Multiplying decimals

1. Multiply as normal

2. Count the amount of numbers behind the decimal on both numbers

3. Count that amount on your answer (backwards)

4. Add a zero if you are missing digits behind the decimal :)

## http://www.youtube.com/watch?v=wRIP45Z0MPc

It wouldn't let me embed the link :) Sorry!

## Dividing decimals

1.First you make the decimal that you are dividing by a whole #

## Adding decimals

1. Add up all your numbers as usual

2. Bring your decimal down

3. You are done!!!!

## Example for adding decimals

1.4

__+ 5.3___

6.7

## Subtracting decimals

1. Line up your numbers by the place value

2. Subtract

3. Bring down the decimal and you are done!!

## Example 4 subtracting decimals

4.5

__- 1.3__

3.2