- Thread starter d.mehdoi
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Addition is associative and commutative.Hello! I have a question about fractions. I'll be glad if someone can help me with that.

View attachment 12205

*** That is2008

In such questions, am I supposed to calculate it or is there a faster way?

Thanks a lot!

(2009 + 5/3) - (2008 + 2/3)

2009 + 5/3 - 2008 - 2/3

2009 - 2008 + 5/3 - 2/3

(2009 - 2008) + (5/3 - 2/3)

Thanks!Addition is associative and commutative.

(2009 + 5/3) - (2008 + 2/3)

2009 + 5/3 - 2008 - 2/3

2009 - 2008 + 5/3 - 2/3

(2009 - 2008) + (5/3 - 2/3)

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I would observeHello! I have a question about fractions. I'll be glad if someone can help me with that.

View attachment 12205

*** That is2008

In such questions, am I supposed to calculate it or is there a faster way?

Thanks a lot!

\(\displaystyle \dfrac{5}{3} \ = \ 1\dfrac{2}{3}\)

and then

\(\displaystyle 2009\dfrac{5}{3} \ = \ 2010\dfrac{2}{3}\)

thus the answer is = 2

Thank you! I didn't see that.I would observe

\(\displaystyle \dfrac{5}{3} \ = \ 1\dfrac{2}{3}\)

and then

\(\displaystyle 2009\dfrac{5}{3} \ = \ 2010\dfrac{2}{3}\)

thus the answer is = 2

Yes my bad, I couldn't write 8 properly on Math input panel. It isAm I the only one to see \(\displaystyle 200 \delta\) in the OP?

-Dan

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In Math input panel you write it with mouse and as far as I could observe if you write 8 starting from right to left it types a delta rather than eight. You should write it starting from left to right. I didn't know this difference at that time and no matter how many times I wrote 8 it typed a delta there. So I kept it this way and noted that it's an eight on the bottom in my message.You accidentally typed "200\delta" instead of "2008" in the tex box? Trouble finding the 8 key?

Also, you can right click the number/symbol and correct it. It gives you options to choose which number/symbol you want to change it to. But as I said I didn't know that at that time. I am a beginner with this software, just as I am in Maths.

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Aahhh, I see the problem. Trying to type with a mouse. Square peg, round hole...In Math input panel you write it with mouse ...

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Thank you for your suggestion, I will learn more about it.

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[2009 + 5/3] - [2008 + 2/3] \(\;\) is correct

2009 + 5/3 - 2008 + 2/3 \(\;\) is not

For more help learning how to type math expressions using a keyboard, check out the link from the forum guidelines titled, "Formatting Math as Text". Cheers

Hello mmm4444bot, thank you! That website will be very helpful.

[2009 + 5/3] - [2008 + 2/3] \(\;\) is correct

2009 + 5/3 - 2008 + 2/3 \(\;\) is not

For more help learning how to type math expressions using a keyboard, check out the link from the forum guidelines titled, "Formatting Math as Text". Cheers

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