History Queen wrote: » Can I suggest we get thread title changed to include students? Or maybe post a link in LC forum? If it is still active?
Smacruairi wrote: » If I knew how to change a title I would!
Moody_mona wrote: » Maths and Science (Chemistry) ask away! Also feel free to ask for study/organisation/planning tips, don't be feeling unnecessarily stressed.
TTLF wrote: » (Maths HL) Also for me, any study tips to help with being able to learn a little more smarter than longer? I work hard but I don't really work smart and I end up learning stuff in 2 hours when it should take really an hour or so. Thanks again
Purple Mountain wrote: » Hi all. My boy is 1st year and I'm just looking over his maths book here now to give myself a refresher to be able to help him next week. I did a few questions myself to get my mind thinking back to secondary maths. If someone could answer this for me next week, I'd appreciate it. I'm confused about brackets. I got the following answer 3+2 (4) = 20 to a question while the book says 4 (3+2) = 20. Are both correct? Another one.. I put (4×5) + 3 = 23 but the book's answer is 4×5+3=23 So, are my my brackets necessary and if not, are they still correct? Thanks!
Smacruairi wrote: » I'm not a maths teacher but... You do whatever is in the brackets first, then whatever impacts the brackets, then the rest. So for your first example "3+2 (4) = 20", that would mean 2x4 first, then plus 3,so 11,so it's written wrong.the book is saying 4 (3+2), ie 3+2=5, then x4 =20. Your second one is fine. But the book is saying you don't need brackets because of BOMDAS, you Di bracket stuff first, then multiplication, division, addition and subtraction in that order. Make sense?
Purple Mountain wrote: » Its question 22 I tried. For example again in iv. I put (12×2) ÷ 6 = 4 as answer. Book says 12x2÷6=4 Part v I put (4×3) - 2=10. Book leaves out brackets again.
Smacruairi wrote: » Brackets are used to multiple whatever is outside the brackets by whatever is inside. So 2(4+3) is 14. You can't use brackets to "separate out". So where you have said (12x2)÷6 =4,yeah that's actually correct, but the brackets are redundant, if u leave them out, 12x2÷6, according to BOMDAS, you do the multiplication first (12x2) and then you divide that by 6. As I said your version is right and probably more visually logical, but by making you remove the brackets they're making sure you understand BOMDAS
Smacruairi wrote: » Nothing else to do!!
TTLF wrote: » (Maths HL) My Girl Friend was wondering if you had any PDF's on Complex numbers or any notes/tips to learn/simplify them? Would be greatly appreciated (HL) She was also wondering if you had any of the same stuff for the chapter on Logs (Both HL) please and thankyou. Also for me, any study tips to help with being able to learn a little more smarter than longer? I work hard but I don't really work smart and I end up learning stuff in 2 hours when it should take really an hour or so. Thanks again
mirrorwall14 wrote: » Hi, There are fully worked solutions available in PDF form for Text and Tests anyways. Does she have those? With maths it really is practise practise practise. For HL she needs to be doing all of the questions in each exercise in her book and practicing the exam questions thoroughly once finished the topic. It’s slow but necessary
Smacruairi wrote: » So where you have said (12x2)÷6 =4,yeah that's actually correct, but the brackets are redundant, if u leave them out, 12x2÷6, according to BOMDAS, you do the multiplication first (12x2) and then you divide that by 6.
TTLF wrote: » She has been practising and doing grinds but maths is hard for her (however she refuses to drop since she's competitive) so she was just wondering if there were any other notes available to explain it since Text and Tests can be god awful at explaining sometimes, however I will tell her about the fully worked solutions PDF! is it anywhere particular? Thankyou!
