Friday, November 18, 2011

Stretch your skills at fractions and probability

Check out the online versions of Connect Four and Racing Game!  Click a link below to begin.
Connect Four 
Racing Game

Below are 3 easy steps for finding the sum or difference of fractions include:
1) Find a common denominator-  list the multiples of both denominators and find the lowest one in common. 
example  2/5  +  1/2     5 and 2 both have  a common multiple of 10
2) Make equivalent fractions- Divide the original denominators by 10 (common denominator).  Use the quotient to multiply by the numerator. 
example  10/5=2   2(2)=4  equivalent fraction 2/5 = 4/10;   10/2=5  5(1)=5  equivalent fraction 5/10=1/2
3) Add/Subtract numerators- Keep the denominator the same, and take the sum or difference of the numerator
example   4/10 + 5/10 =     4 + 5    =  9
                                          ------      ---
                                            10         10

Real life use of Fractions involves beats in music, cooking recipes, clothing design, city buildings, and sports statistics.  What are some ways you see fractions used in real life?  How does your science fair experiment involve the use of fractions, data, or math displays?       

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