## LonelyandForgotten 2 years ago Who can teach me basic math skills? pleaseeee, this is very urgent!

1. hartnn

yes, do you have any specific question ?

Sounds like a lot of work , but what exactly do you call basic?

3. LonelyandForgotten

nope, nothing in mind.. i guess first thing i would like to learn is how do you cross multiply?

4. LonelyandForgotten

its just that i will be taking a test over these skills to see how much i know and i know nothing at all :/ so i need some help

5. Goten77

basic skills lesson 1: $\int\limits_{}^{}= the INtegral symbol$

6. LonelyandForgotten

okayy..

7. hartnn

sure, cross-multiplication |dw:1358451891181:dw| got this ?

8. LonelyandForgotten

i think so, yeah

9. hartnn

need example ?

10. hartnn

|dw:1358452038527:dw| you try ...

11. LonelyandForgotten

maybe i should just look in a math textbook or something :/

12. Goten77

|dw:1358452105344:dw| lesson 2 the derivative

13. ghazi

$4\frac{ 4 }{ 5 }= \frac{ 4*5 +4 }{ 5}=\frac{ 20+4 }{ 5 }=\frac{ 24 }{ 5 }$ @LonelyandForgotten remember this?

14. LonelyandForgotten

@hartnn umm 18 is the answer?

15. hartnn

|dw:1358452176435:dw||dw:1358452197271:dw||dw:1358452223444:dw| now ?

16. LonelyandForgotten

@ghazi is that for cross multiplication?

17. hartnn

are you understanding the drawings ?

18. ghazi

no that is for changing fraction

19. Goten77

|dw:1358452384626:dw|

20. ghazi

for cross multiplication lets say we have $\frac{ 2 }{ 3 }=\frac{ x }{ 4 }$ then by cross multiplication we can see that $2*4=x*3$ and x=2*4/3=8/3|dw:1358452516250:dw| @LonelyandForgotten hope its clear to you now :)

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