Ms Sadler’s golf league has 48 members Ms Sadler’s golf league has 48 members. If the league splits into teams of 12 members each, how many equally sized teams will there be? Friday, 9/14/12

Fraction Multiplication And Cancelation

Fraction Multiplication Here are some fraction multiplication problems Can you tell how to multiply fraction from these examples?

4 3 x 5 Multiplication Multiply numerator by numerator And denominator by denominator 3 5 x 4

Try some. Multiply the following:

Answers Multiply the following: http://www.youtube.com/watch?v=CTKMK1ZGLuk Multiply the following:

Multiplying Mixed Numbers Because of the order of operations, Mixed numbers cannot be multiplied as is Change mixed numbers to improper fractions, then multiply.

Try some Change any whole or mixed numbers to improper. http://www.youtube.com/watch?v=MYrxikDJWoA&feature=relmfu Change any whole or mixed numbers to improper. Multiply straight across. Simplify answers

Answers Change any whole or mixed numbers to improper. Multiply straight across. Simplify answers

Reduce before you multiply Cancelling Reduce before you multiply

To cancel before multiplying: Reduce by finding the GCF diagonally 5 24 10 15 x

3 4 5 6 x

Independent Practice On Notebook Paper Page 263 (Lesson 7-2) #13-18 Page 267 (Lesson 7-3) #11-14 Early Finishers Page 236, 19-24 Page 267, 15-22

Cancelling when Multiplying Fractions Reduce the numbers diagonally What is the GCF of those two numbers? Multiply across Simplify 25 x 12 32 35 http://www.youtube.com/watch?v=bRYwsbOGnf4

Canceling Reducing before multiplying is called canceling. Instead think the following in your head.

Canceling on paper Rules: One factor from any numerator cancels with like factor from the denominator.

Try one Say “--- goes into ____ this many times.” As you cross each number out and write what is left after canceling above the number.

Answer Say “--- goes into ____ this many times.” As you cross each number out and write what is left after canceling above the number.

Try one more Make whole and mixed numbers improper Cancel if you can Multiply Numerators and denominators straight across. Simplify

Answer Make whole and mixed numbers improper Cancel if you can Multiply Numerators and denominators straight across. Simplify