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anonymous

  • one year ago

What is the estimated value of the expression if each number in the expression is rounded to the nearest whole unit? (4.18)(1.93)(8.72)

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  1. anonymous
    • one year ago
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    @whpalmer4 Umm i got 0

  2. AlexandervonHumboldt2
    • one year ago
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    use the calculator to do this. Or there is not permited to use it? your answer is not correct if the sing between the ( ) is multiplication

  3. anonymous
    • one year ago
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    ty

  4. whpalmer4
    • one year ago
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    okay, if we round to the nearest whole unit, what are the rounded off values of 4.18, 1.93 and 8.72?

  5. anonymous
    • one year ago
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    hmm

  6. whpalmer4
    • one year ago
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    "nearest whole unit" means "nearest counting number"

  7. whpalmer4
    • one year ago
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    "unit" <--> "1" in this context

  8. anonymous
    • one year ago
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    Okay....let me think. Btw this is my worst topic ever

  9. whpalmer4
    • one year ago
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    Have no fear, I'm here :-)

  10. anonymous
    • one year ago
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    Okay :3 well........

  11. whpalmer4
    • one year ago
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    4.18 - is that closer to 4, or 5?

  12. anonymous
    • one year ago
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    4

  13. whpalmer4
    • one year ago
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    very good. if we use my method from previous problem, we are rounding to the 1's place, so we add 0.5 4.18 +0.5 ----- 4.68 drop everything after the place where we are rounding 4 our first number is (4) how about the next two?

  14. anonymous
    • one year ago
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    lol

  15. anonymous
    • one year ago
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    this not the place for this

  16. anonymous
    • one year ago
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    like u said;

  17. anonymous
    • one year ago
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    There....now where were we?

  18. whpalmer4
    • one year ago
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    Okay, so we had "simplified" our expression from \[(4.18)(1.93)(8.72)\] to \[(4)(1.93)(8.72)\] but we still need to round the second two numbers before multiplying to get our estimate

  19. anonymous
    • one year ago
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    Okay

  20. whpalmer4
    • one year ago
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    what is the nearest counting number to 1.93?

  21. anonymous
    • one year ago
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    2?

  22. whpalmer4
    • one year ago
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    as an old math teacher of mine used to say when someone answered without conviction in their voice, "is that an answer, or a prayer?" :-)

  23. anonymous
    • one year ago
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    Lol X'D 2

  24. whpalmer4
    • one year ago
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    that's better! How about the third one?

  25. anonymous
    • one year ago
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    9

  26. whpalmer4
    • one year ago
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    correctamundo. so now we have which 3 numbers to multiply together?

  27. anonymous
    • one year ago
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    uh 4*2*9

  28. anonymous
    • one year ago
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    :_:

  29. whpalmer4
    • one year ago
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    which equals...

  30. anonymous
    • one year ago
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    =72

  31. whpalmer4
    • one year ago
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    excellent! if we'd done the problem as originally stated, we would have 70.347728 so our estimate is pretty good, and a lot less work!

  32. anonymous
    • one year ago
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    Thank you (:

  33. whpalmer4
    • one year ago
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    you're welcome, of course

  34. anonymous
    • one year ago
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    So it would be 70.347728 or do with take off some numbers?

  35. anonymous
    • one year ago
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    70.34 O.O

  36. whpalmer4
    • one year ago
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    No, the answer is 72. I'm just telling you what we would have gotten if we hadn't done an estimate, but instead multiplied the 3 original numbers in all of their magnificence :-)

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