Michael+A.+8-41



i will talk about adding and subtracting fractions.

__to add common denominator fractions:__
 * Adding**

just add: 2/4 + 3/4 = 5/4 then convert the answer to a mixed fraction
 * 1 1/4**

__to add uncommon denominator fractions:__ find a common denominator:

1/2 + 3/4 = (2 x 2 4, 1 x 2 2) 2/4 + 3/4

then you get 7/4 which is equal to **1 3/4**

__to add mixed number and a proper fraction__ 1 2/5 + 7/10 add normally : 1 2/5 + 7/10 (1 4/10 + 7/10 = 1 11/10) then we reduce : 1 11/10 = **2 1/10**


 * Subtracting**

__to subtract like fractions just subtract normally__

2/4 - 1/4 = **1 1/4**

__to subtract uncommon denominator fractions find a common denominator and subtract__

1/5 - 1/10 = 2/10 - 1/10 **1/10.**

__when you're subtracting mixed fraction with a less numerator than the other__

1 2/7 - 6/7 borrow from the mixed number, and add the denominator to the numerator, in this case 7: 1 2/7 = 9/7 so now we can subtract properly: 9/7 - 6/7 = 3/7

Here is the main space for my unproject. (http://spfractions.wikispaces.com/841michaelunProject)