## LonelyandForgotten Group Title Who can teach me basic math skills? pleaseeee, this is very urgent! one year ago one year ago

1. hartnn Group Title

yes, do you have any specific question ?

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

3. LonelyandForgotten Group Title

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

4. LonelyandForgotten Group Title

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 Group Title

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

6. LonelyandForgotten Group Title

okayy..

7. hartnn Group Title

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

8. LonelyandForgotten Group Title

i think so, yeah

9. hartnn Group Title

need example ?

10. hartnn Group Title

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

11. LonelyandForgotten Group Title

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

12. Goten77 Group Title

|dw:1358452105344:dw| lesson 2 the derivative

13. ghazi Group Title

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

14. LonelyandForgotten Group Title

@hartnn umm 18 is the answer?

15. hartnn Group Title

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

16. LonelyandForgotten Group Title

@ghazi is that for cross multiplication?

17. hartnn Group Title

are you understanding the drawings ?

18. ghazi Group Title

no that is for changing fraction

19. Goten77 Group Title

|dw:1358452384626:dw|

20. ghazi Group Title

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 :)