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Sen Vanos Offline
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How to stop making dumb mistakes? - June 22nd 2016, 02:18 PM

The title says it all.

Say I have a question with the formula 4/3*x, and x is 9. I would first calculate what 1/3 of 9 is, which is 3, all fine until now. And then I forget that I have to calculate 4/3*9, not 1/3*9, and fill in 3. How do I prevent this?
   
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Re: How to stop making dumb mistakes? - June 22nd 2016, 02:33 PM

Practice.
Practice.
And more practice.
That is the most effective and useful way.
Try it out.
   
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Re: How to stop making dumb mistakes? - June 22nd 2016, 02:46 PM

Write everything down. Everything. Even if you use a calculator, write it down. If you have to write out what steps you need to do in what order. And check your work, check it again. Make sure your answer works.



"We all have battle scars, Finn. Suck it up and build a brace for yours."
   
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Re: How to stop making dumb mistakes? - June 24th 2016, 12:52 PM

Quote:
Originally Posted by Sen Vanos View Post
The title says it all.

Say I have a question with the formula 4/3*x, and x is 9. I would first calculate what 1/3 of 9 is, which is 3, all fine until now. And then I forget that I have to calculate 4/3*9, not 1/3*9, and fill in 3. How do I prevent this?
Hi Sen,

A mneumonic device that I learned is Please Excuse My Dear Aunt Sally or PEMDAS which stands for Paranthathis, exponents, Multiplication, Division, Addition, Subtraction.

Another thing that helped would be to put whole numbers over 1.
So in your example it can look like this:

4/3*x/1
4/1*1/3*x/1

That way the numbers are all on even lengths.

then you can do x=9 therefore 1/3 *x/1=3
and 4/1*3/1= 12
   
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