anonymous
  • anonymous
How can you use subtraction to describe division?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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jamiebookeater
  • jamiebookeater
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Falling_In_Katt
  • Falling_In_Katt
by "subtracting" or crossing out equal-size groups from the total in the visual model, until there is nothing left.
Falling_In_Katt
  • Falling_In_Katt
Understand?
anonymous
  • anonymous
yes :) thanks ... can you help me with some more questions please? @Falling_In_Katt

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Falling_In_Katt
  • Falling_In_Katt
I can try
anonymous
  • anonymous
Can you divide by zero? Why or why not?
Falling_In_Katt
  • Falling_In_Katt
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.
Falling_In_Katt
  • Falling_In_Katt
Understand?
anonymous
  • anonymous
yes next!
Falling_In_Katt
  • Falling_In_Katt
I'll try
Hero
  • Hero
@geny55, What do you understand now about division by zero that you didn't before?
anonymous
  • anonymous
i just didnt get why you coudnt divide by 0
Falling_In_Katt
  • Falling_In_Katt
But what did you learn about why you can't divide by 0?
anonymous
  • anonymous
that it would be undefined :) and you cant do it because it would just give you 0
anonymous
  • anonymous
How do you change a rational number to a decimal? Can you give an example of each?
Falling_In_Katt
  • Falling_In_Katt
I can tell you how. Then you try to make examples.
Falling_In_Katt
  • Falling_In_Katt
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.
anonymous
  • anonymous
so now i do the example?
Falling_In_Katt
  • Falling_In_Katt
Try to do this -Express 7 / 8 rational numbers to decimals form by long division method
anonymous
  • anonymous
ok
Hero
  • Hero
@geny55 what does ''undefined" mean to you in terms of division by zero?
anonymous
  • anonymous
i got 1.14285714
Falling_In_Katt
  • Falling_In_Katt
That's wrong. Here ill set the equation up for you. \[7.000 \div 8\]
anonymous
  • anonymous
can i do 17 / 8 instead please
Falling_In_Katt
  • Falling_In_Katt
You would get the wrong answer, you must use long division! Be sure to show your steps.
texaschic101
  • texaschic101
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
anonymous
  • anonymous
ok
anonymous
  • anonymous
so whats the problem again?
Falling_In_Katt
  • Falling_In_Katt
Express 7 / 8 rational numbers to decimals form by long division method.
texaschic101
  • texaschic101
do you know how to do long division geny ?
anonymous
  • anonymous
yes :)
Falling_In_Katt
  • Falling_In_Katt
Set it up like \[7.000\div8\]
texaschic101
  • texaschic101
even when you have to add a decimal and zeros
anonymous
  • anonymous
yes
texaschic101
  • texaschic101
its just simple division....if you know long division, then you already know this
anonymous
  • anonymous
|dw:1442849658998:dw|
Falling_In_Katt
  • Falling_In_Katt
|dw:1442849773706:dw|
texaschic101
  • texaschic101
you did 8/7 ,Geny
anonymous
  • anonymous
oh, whoops.. sorry
texaschic101
  • texaschic101
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 ?
anonymous
  • anonymous
|dw:1442849967305:dw|
texaschic101
  • texaschic101
correct.....so 7/8 as a decimal is 0.875
anonymous
  • anonymous
yes!
texaschic101
  • texaschic101
nicely done :)
anonymous
  • anonymous
thanks i have somoe more questions :) please stay :)
Falling_In_Katt
  • Falling_In_Katt
Okay
anonymous
  • anonymous
this is the last question :) Explain how to write repeating decimals in proper form?

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