I could take some Maths tips(O level), in all subjects I get A except Maths in which I get a U.I don't take tuition so I'll prefer advises for better learning at home.My old concepts are unclear and the books that I have(O level Mathematics 3,4,5) don't help.
You got your answer there!
O Level Math is a game of concepts. Prime basic concepts. Many people get the simple, paper 1 questions wrong. I'll make a guide by tonite and add something I can.
But for Math and Add Math, nothing more would I suggest than practice. Go through the books once, and do alternate, if not all questions. Do ALL revision and miscellaneous exercises and do the past 5 years x2 past papers. That's enough for an A*. Good luck this time!
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I wish there was a easier book, I know the basics and I use KhanAcademy too, its just that for a moment I'm like that's so easy and when I get another question from the same topic my brain just stops working and I can't solve it :/
The brain stops working part is a clear symptom of lacking practice. If you've done enough questions of Math, you will never get confused.
Math is like a big puzzle with two halves ; Arithmetic and Algebra.
You MUST get (almost) everything right conceptually of either of the section to get their questions right.
Most Add Math students get the Algebra halves practice done thanks to the identities in Add Math, though it's indirectly linked.
When's your O Level final? I believe you still have enough time to practice and kick the papers ass instead of the other way round. Esp cos O Level Math's exam is really, really easy and there's ample time to solve it.