Question

Math 6 A Unit 6: Multiplying and Dividing Fraction
Find the product. Simplify.
1. 1 /10 x 3/4
[15/2] [2/15] [3/40] [40/3]
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2. 4/5 of 40
[32] [1/32] [12] [44/5]
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3. 1/3 of 3
[1/18] [1/3] [1] [1/9]
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4. Betty had 1/7 yard of ribbon. She used 1/6 of it. How many yards of ribbon did she use?
[42 yd] [7/6yd] [1/42yd] [6/7]
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5. Suppose you have 15 muffins. How many muffins are left after you give a friend 1/3 of them?
[12 muffins] [10 muffins] [45 muffins] [5 muffins]
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Find the product.
6. 8 x 5 1/2
[40 1/2] [42 1/2] [44] [48]
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7. At a warehouse, boxes of merchandise are placed on shelves in stacks that are 7 boxes high. If each box is 4 3/5 inches in height, how tall is the stack of boxes?
[5/161 in.] [1 12/23 in.] [23/35 in.] [32 1/5]
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8. Evaluate 2/3 x for x = 3/4
[1/2] [8/9] [9/8] [2]
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Please Help Me, I'm Desperate

Answer 1

multiply tops and bottoms separately
when dividing, flip the divisor upside down and then multiply.

2/3 * 4/7 = (2*4)/(3*7) = 8/21
2/3 ÷ 4/7 = 2/3 * 7/4 = 14/12
For mixed numbers, convert first to fractions.
2 3/4 * 1 2/5 = 11/4 * 7/5 = 77/20

Now follow the same steps with your numbers. Show your work if you get stuck.