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Old 04-07-2011, 07:47 PM   #51
kjc
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Quote:
Originally Posted by Ellie May View Post
Okay, if M and D are equal, then it makes sense why it would be done left to right , but:

48/2(9+3)
48/2(12)
We still haven't gotten rid of the parentheses. So we can just pull 12 out and make it read 48/2x12 and ignore that the 12 is still in the ()?
Exactly... no bc the number outside the () has to be applied to the number inside the () before moving forward. The () is like glue, all operations must happen to it first before going on. You see 2(12) then you can read it as 2 x 12, but you perform the function and make it 24, then put it back into the problem 48/24. which =2.

If that were allowed, you could also do it like 48/2x9(+3) or 48/2x9+3 or ...
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