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anonymous

  • one year ago

How can you use subtraction to describe division?

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  1. Falling_In_Katt
    • one year ago
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    by "subtracting" or crossing out equal-size groups from the total in the visual model, until there is nothing left.

  2. Falling_In_Katt
    • one year ago
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    Understand?

  3. anonymous
    • one year ago
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    yes :) thanks ... can you help me with some more questions please? @Falling_In_Katt

  4. Falling_In_Katt
    • one year ago
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    I can try

  5. anonymous
    • one year ago
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    Can you divide by zero? Why or why not?

  6. Falling_In_Katt
    • one year ago
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    Division by zero is an operation for which you cannot find an answer, so it is disallowed. You can understand why if you think about how division and multiplication are related. 12 divided by 6 is 2 because 6 times 2 is 12 12 divided by 0 is x would mean that 0 times x = 12 But no value would work for x because 0 times any number is 0. So division by zero doesn't work.

  7. Falling_In_Katt
    • one year ago
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    Understand?

  8. anonymous
    • one year ago
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    yes next!

  9. Falling_In_Katt
    • one year ago
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    I'll try

  10. Hero
    • one year ago
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    @geny55, What do you understand now about division by zero that you didn't before?

  11. anonymous
    • one year ago
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    i just didnt get why you coudnt divide by 0

  12. Falling_In_Katt
    • one year ago
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    But what did you learn about why you can't divide by 0?

  13. anonymous
    • one year ago
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    that it would be undefined :) and you cant do it because it would just give you 0

  14. anonymous
    • one year ago
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    How do you change a rational number to a decimal? Can you give an example of each?

  15. Falling_In_Katt
    • one year ago
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    I can tell you how. Then you try to make examples.

  16. Falling_In_Katt
    • one year ago
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    Convert a rational number to a decimal using long division; know that the decimal form of a rational number terminates in 0s or eventually repeats.

  17. anonymous
    • one year ago
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    so now i do the example?

  18. Falling_In_Katt
    • one year ago
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    Try to do this -Express 7 / 8 rational numbers to decimals form by long division method

  19. anonymous
    • one year ago
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    ok

  20. Hero
    • one year ago
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    @geny55 what does ''undefined" mean to you in terms of division by zero?

  21. anonymous
    • one year ago
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    i got 1.14285714

  22. Falling_In_Katt
    • one year ago
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    That's wrong. Here ill set the equation up for you. \[7.000 \div 8\]

  23. anonymous
    • one year ago
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    can i do 17 / 8 instead please

  24. Falling_In_Katt
    • one year ago
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    You would get the wrong answer, you must use long division! Be sure to show your steps.

  25. texaschic101
    • one year ago
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    if you have to show your work by using long division, then just using a calculator to do it will not work. However, you can use a calculator to check your answer

  26. anonymous
    • one year ago
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    ok

  27. anonymous
    • one year ago
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    so whats the problem again?

  28. Falling_In_Katt
    • one year ago
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    Express 7 / 8 rational numbers to decimals form by long division method.

  29. texaschic101
    • one year ago
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    do you know how to do long division geny ?

  30. anonymous
    • one year ago
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    yes :)

  31. Falling_In_Katt
    • one year ago
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    Set it up like \[7.000\div8\]

  32. texaschic101
    • one year ago
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    even when you have to add a decimal and zeros

  33. anonymous
    • one year ago
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    yes

  34. texaschic101
    • one year ago
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    its just simple division....if you know long division, then you already know this

  35. anonymous
    • one year ago
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    |dw:1442849658998:dw|

  36. Falling_In_Katt
    • one year ago
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    |dw:1442849773706:dw|

  37. texaschic101
    • one year ago
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    you did 8/7 ,Geny

  38. anonymous
    • one year ago
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    oh, whoops.. sorry

  39. texaschic101
    • one year ago
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    its easy to get confused on that....the numerator is in the box, the denominator is what you are dividing by and is outside the box...understand ?

  40. anonymous
    • one year ago
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    |dw:1442849967305:dw|

  41. texaschic101
    • one year ago
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    correct.....so 7/8 as a decimal is 0.875

  42. anonymous
    • one year ago
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    yes!

  43. texaschic101
    • one year ago
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    nicely done :)

  44. anonymous
    • one year ago
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    thanks i have somoe more questions :) please stay :)

  45. Falling_In_Katt
    • one year ago
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    Okay

  46. anonymous
    • one year ago
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    this is the last question :) Explain how to write repeating decimals in proper form?

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