ANSWERS: 4
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9 Minutes, 6 seconds
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9.1 mins
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First children were expected to learn to perform basic arithmetic themselves - add subtract multiply and divide. Then calculators were allowed. (but with no math knowledge to fall back on how do you know the calculator gave you the right answer?) and now we have answerbag to do the work for you. but how do you know 9.1 minutes is right?
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9.1 minutes
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