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matthew120

  • one year ago

Which is the best estimate for the quotient of 686.13 ÷ 9.231? A. 7,000 B. 700 C. 70 D. 7

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  1. tkhunny
    • one year ago
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    What do you think? Do a quick and dirty estimate. See if anything is even close.

  2. matthew120
    • one year ago
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    i want to say its b

  3. jjwalton04
    • one year ago
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    that would be incorrect, because 686.13 ÷ 9.231=74.3288918 and since the second number is four, when you round down you get 70

  4. jjwalton04
    • one year ago
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    so the answer is c

  5. tkhunny
    • one year ago
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    Horrible. Absolutely horrible. What's the point of estimation if you're just using a calculator?! 686.13 isn't too far from 700 9.231 isn't too far from 10 700 / 10 = 70 -- Now THAT is an estimate.

  6. jjwalton04
    • one year ago
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    -_- i like my way better

  7. tkhunny
    • one year ago
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    "Your way" isn't a way at all. It's just using a calculator. That will not EVER be a good way to produce a quick and useful estimate in your head. It's just using a calculator. That will not help you when the grid goes down, you run out of fuel in your generator, and your last battery dies. The problem is to teach estimating. Calculator usage is a different class.

  8. jjwalton04
    • one year ago
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    ... Bro calm down.

  9. tkhunny
    • one year ago
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    No calming necessary. Just the facts.

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