keys to multiplying fractions multiply the numerators multiply the denominators always simplify your...

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Keys To Multiplying Fractions Multiply the numerators Multiply the denominators Always simplify your answer (GCF can aid in reducing fractions) Numerators Denominators

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Page 1: Keys To Multiplying Fractions Multiply the numerators Multiply the denominators Always simplify your answer (GCF can aid in reducing fractions) Numerators

Keys To Multiplying FractionsMultiply the numerators Multiply the denominatorsAlways simplify your answer (GCF can aid in reducing fractions)Numerators       

Denominators

Page 2: Keys To Multiplying Fractions Multiply the numerators Multiply the denominators Always simplify your answer (GCF can aid in reducing fractions) Numerators

Multiply Fractions

Is the same as:

Page 3: Keys To Multiplying Fractions Multiply the numerators Multiply the denominators Always simplify your answer (GCF can aid in reducing fractions) Numerators

Multiplying fractions (cont.)You must remember to simplify your answers

when you are requested to do so.

Final answer

Page 4: Keys To Multiplying Fractions Multiply the numerators Multiply the denominators Always simplify your answer (GCF can aid in reducing fractions) Numerators

Reducing FractionsWhen reducing fractions you must remember

that what ever number you find to “go into” the top number without a remainder , it must also “go into” the bottom number without a remainder.

Page 5: Keys To Multiplying Fractions Multiply the numerators Multiply the denominators Always simplify your answer (GCF can aid in reducing fractions) Numerators

Multiplying Fractions (cont.)Short cuts (reduce before multiplying)In this example, the 4s cancel each other.

Page 6: Keys To Multiplying Fractions Multiply the numerators Multiply the denominators Always simplify your answer (GCF can aid in reducing fractions) Numerators

Multiply Mixed NumbersMixed Numbers are no problem, convert to

improper fractions and then take advantage of prior knowledge.

Same Number

Final Answer

Page 7: Keys To Multiplying Fractions Multiply the numerators Multiply the denominators Always simplify your answer (GCF can aid in reducing fractions) Numerators

Word Problem Example John has a whole pizza that contains 8 slices.

If he ate ¼ of the whole pizza, how many slices did he eat? Show your work and answer the question in a complete sentence

Answer is:

Page 8: Keys To Multiplying Fractions Multiply the numerators Multiply the denominators Always simplify your answer (GCF can aid in reducing fractions) Numerators

Second Example A recipe called for 6 cups of flour and it is

for 24 servings. If you only had 2 cups of flour in your pantry, how many servings will 2 cups of flour produce? Show all of your work.

Answer is:

Page 9: Keys To Multiplying Fractions Multiply the numerators Multiply the denominators Always simplify your answer (GCF can aid in reducing fractions) Numerators

Additional resources.http://www.learner.org/courses/learningmath/number/session9/part_a/

try.html

This website will show a pictorial representation for multiplying fractions. Also known as mathematical modeling for multiplying fractions.