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anonymous

  • one year ago

What is the value of the expression? 6 • [(32 − 8) ÷ 4 + 2]

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  1. anonymous
    • one year ago
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    @butterflydreamer

  2. butterflydreamer
    • one year ago
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    solve what's in the brackets first! (32 - 8) = ?

  3. OnePieceFTW
    • one year ago
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    Order of operations say to do parentheses first.

  4. anonymous
    • one year ago
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    24

  5. butterflydreamer
    • one year ago
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    Good and now 24 divided by 4 = ?

  6. anonymous
    • one year ago
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    = 6

  7. butterflydreamer
    • one year ago
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    correct! Now add 2 . 6 + 2 =?

  8. anonymous
    • one year ago
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    =8

  9. butterflydreamer
    • one year ago
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    yep and now, multiply by 6 and you're done :)

  10. anonymous
    • one year ago
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    can you help me with a few mor like this

  11. anonymous
    • one year ago
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    so the answer is 78

  12. butterflydreamer
    • one year ago
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    Sure. I've noticed that you've been posting similar questions though. Just remember the order of operations and BODMAS and you'll be fine :) And that is not quite the answer. 6 times 8 = ?

  13. anonymous
    • one year ago
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    oh = 48

  14. anonymous
    • one year ago
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    im sorry

  15. butterflydreamer
    • one year ago
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    that's correct :) Also, if you don't understand BODMAS, it's the same as PEMDAS http://prntscr.com/86271w <- super helpful reference with order of operations!

  16. anonymous
    • one year ago
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    ok so you can help me with two more qestions right

  17. OnePieceFTW
    • one year ago
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    BODMAS was before we added exponents to the mnemonic

  18. anonymous
    • one year ago
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    Which placement of grouping symbols in the expression gives it a value of 22? 3 • 4 – 2 + 5 +7 A. 3 • [4 – (2 + 5) + 7] B. (3 • 4) – [2 + (5 + 7)] C. [(3 • 4) – 2] + (5 + 7) D. 3 • (4 – 2) + (5 + 7)

  19. anonymous
    • one year ago
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    thats the nest one

  20. mathstudent55
    • one year ago
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    Try each choice using the correct order of operations, and see which one gives you the answer you need.

  21. anonymous
    • one year ago
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    ok

  22. mathstudent55
    • one year ago
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    What does the O mean in BODMAS?

  23. anonymous
    • one year ago
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  24. mathstudent55
    • one year ago
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    The way to do a problem like this is to do one step at a time and writing everything else each step. Of course, you need to follow PEMDAS for each step. 6 • [(32 − 8) ÷ 4 + 2] = = 6 • [24 ÷ 4 + 2] = 6 • [6 + 2] = 6 • 8 = 48 By writing everything each step, you don't forget any operation.

  25. mathstudent55
    • one year ago
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    Also, it is important to understand PEMDAS properly. Most people don't know how it works.

  26. mathstudent55
    • one year ago
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    @jpharper Let's work through each choice of the second problem.

  27. anonymous
    • one year ago
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    ok

  28. mathstudent55
    • one year ago
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    A. 3 • [4 – (2 + 5) + 7] = Innermost parentheses first: = 3 • [4 – 7 + 7] We still have the square parentheses, so we do that next.

  29. anonymous
    • one year ago
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    ok

  30. mathstudent55
    • one year ago
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    Inside the square brackets, we have a subtraction and an addition. In PEMDAS, AS means addition, Subtraction. Those two operations are the same level of priority, so we do them in the order they appear from left to right. = 3 • [-3 + 7] = 3 • 4 = 12

  31. anonymous
    • one year ago
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    this is the answer [(3 • 4) – 2] + (5 + 7)

  32. mathstudent55
    • one year ago
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    This is what I meant by understanding PEMDAS properly. Do operations of each line before the next line below. P - parentheses E - exponents MD - multiplications and divisions in the order they appear from left to right AS - additions and subtractions in the order they appear from left to right

  33. mathstudent55
    • one year ago
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    Many people think that PEMDAS means doing the operations in the order below, but that is incorrect. P - parentheses \ E - exponents \ M - multiplications \ D - divisions / The PEMDAS shown to the left is incorrect. A - additions / S -subtractions / The correct order is what I wrote in the previous response above with MD in one line and AS in one line.

  34. mathstudent55
    • one year ago
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    Yes, you are correct.

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