SOLUTION: How do you estimate fractions? I have tried and tried and keep getting the estimate wrong. I get the actual answer right, but the estimate wrong. Here is an example 3 2/5*2 1/7

Question 1109435: How do you estimate fractions? I have tried and tried and keep getting the estimate wrong. I get the actual answer right, but the estimate wrong. Here is an example
3 2/5*2 1/7 estimate is 35 and the actual answer is 32 31/40.
Thank you
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
How do you estimate fractions? I have tried and tried and keep getting the estimate wrong. I get the actual answer right, but the estimate wrong. Here is an example
3 2/5*2 1/7 estimate is 35 and the actual answer is 32 31/40.
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3 2/5*2 1/7 = (17/5)*(15/7) = 51/7 = 7 2/7.
32 31/40 ???
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To estimate, ir's ~ 3.5*2 = 7
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What's the purpose of estimating?
A waste of time, IMO.
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