Multiplying Fractions Ch 3.3

Just Follow These Easy Steps! 1. Multiply the numerators and write down the answer as your new numerator. 2. Multiply the denominators and write down the answer as your new denominator. 3. Simplify.

Example1 3 4 x 2 9 = 6 36 = Multiply the numerators and write down the answer as your new numerator. 2.Multiply the denominators and write down the answer as your new denominator. 3.Simplify. ÷6

15 x 1 61 = 6 = 5 2 Five halves is improper, so we divide the bottom into the top Multiplying by a Whole Number If you want to multiply a fraction by a whole number, turn your whole number into a fraction by placing a 1 as the denominator. If your answer is improper, divide the bottom into the top.

Simplifying Factors n Before you multiply, you can make the problem simpler. n You can find the GCF of any numerator and denominator. n Find a factor that equally divides the top number and bottom number, divide, and rewrite the problem.

Example x 8 16 In the second fraction, 8 and 16 have a GCF of 8. 8 ÷ 8 = 1 and 16 ÷ 8 = Now, multiply with the simpler numbers. 5 x 1 = 5 and 7 x 2 =

Example x 5 12 The top of the first fraction and the bottom of the second fraction have a common factor. The GCF of 2 and 12 is 2. 2 ÷ 2 = 1, and 12 ÷ 2 = Now, multiply: 5 18

Three-eighths of the animals in a pet store are fish. Two- fifteenths of the fish are tropical fish. What fraction of the animals in the pet store are tropical fish? Find the solution. One-twentieth of animal in the store are tropical fish

Classwork Time! Page #7,8, (do not need to use benchmarks) # 9,11,12,18