Maths question, urgent :(

[Excellent2]

Alright I'm absolutely crusty at maths so here goes:

Reference:

If B = 16. C = 2, D=4, E=8, calculate the value of A (D for question c) for thr following expressions. Note * means multiply and / means divide.

A) A = B + C * D / E - C
B) A = (B + D * 2) / (E * D+C)
C) D = D + E

Whats the answers?

Thanks :)

[Kieeran]

i think 1 = 7 not sure tho LOL

[myke]

1. 4
2. 24 / 34 = idk calculator pls
3. 12

[Kieeran]

1. 4
2. 24 / 34 = idk calculator pls
3. 12

im pretty sure 1 is 7

[Cyndia]

The important thing for this is just to remember the order of operations. PEMDAS is the abbrv. and I always remembered it with the expression 'Please Excuse My Dear Aunt Sally'. So yeah, it means you should calculate problems in this order: Parenthesis, Exponents, Multiplication & Division, and Addition & Subtraction.

A) A = 16 + 2*4/8-2
A = 16 + 8/8 -2
A = 16 + 1 - 2
A = 15

B) A = (16 + 4 * 2) / (8 * 4 + 2)
A = (16 + 8)/(32 + 2)
A = 24 / 34
A = 0.7

C) D = D + 8

Someone else should verify (i might have messed up one of the calculations). I'm also not sure on C? Did you mistype the problem?

[myke]

A) A = B + C * D / E - C
If B = 16. C = 2, D=4, E=8,

A = 16 + 2 * 4 / 8 - 2
= 16 +8 / 6
= 24 / 6
= 4

[Excellent2]

im pretty sure 1 is 7Why though? I'm dumb :P

[Excellent2]

So many different answers but which is right ;/ lmao.

Edited by Cyndia (Forum Moderator): Please do not double post within the edit time, simply edit your previous post.

[kk.]

everyone listen to me, i am correct :P

1. 15
2. 12/17
3. youve wrote it wrong?! because that would mean E = 0?

[myke]

kk, 4 + 8 doesn't = 0 ? :S

[Caution]

The important thing for this is just to remember the order of operations. PEMDAS is the abbrv. and I always remembered it with the expression 'Please Excuse My Dear Aunt Sally'. So yeah, it means you should calculate problems in this order: Parenthesis, Exponents, Multiplication & Division, and Addition & Subtraction.

A) A = 16 + 2*4/8-2
A = 16 + 8/8 -2
A = 16 + 1 - 2
A = 15

B) A = (16 + 4 * 2) / (8 * 4 + 2)
A = (16 + 8)/(32 + 2)
A = 24 / 34
A = 0.7

C) D = D + 8

Someone else should verify (i might have messed up one of the calculations). I'm also not sure on C? Did you mistype the problem?
ah, i thought it was that. we call it bodmas though. (brackets of division, multiplication, addition and subtraction.

[kk.]

kk, 4 + 8 doesn't = 0 ? :S
but, if D = D + E,
D - D = E
0 = E

which is why i think its a misprint. If the two Ds were different, as in d and D then it would be 12, yes.

ah, i thought it was that. we call it bodmas though. (brackets of division, multiplication, addition and subtraction.

we call it BODMAS or BIDMAS, and its brackets, indices, division, multiplication, addition, subtraction

[Kardan]

Just follow BIDMAS which tells you the order on how to tackle equations and such.

Brackets
Indices
Division
Multiplication
Addition
Subtraction

So the answers are:

A) 15
B) ~0.7
C) 12

To be fair, C was really easy unless I'm missing something?

C) can't be 0, because in his explanation he says he's looking for D, not E. So I'm guessing they're two different Ds?

And for BODMAS, isn't it Brackets, Order, Division - Where Order just means the same as Indices?

[Excellent2]

So confused :( lmao. I got people shouting so many different answers. I typed C correctly. Does it have to use BODMAS/BIDMAS?

[kk.]

YES LUCAS!! for the last time!! BIDMAS/BODMAS IS A GENERAL RULE FOR ALL MATHS PROBLEMS! AND C SURELY CANT BE 12, BECAUSE YOU KNOW WHAT D IS!

D = D + E <- D can only be D, it cant be D + E as E is a number, which would make D a different number not D. if that makes sense

if it was d = D + E then yeh, d = 12

[Kardan]

AND C SURELY CANT BE 12, BECAUSE YOU KNOW WHAT D IS!

Then C surely can't be 0, because you know that E is?

[Excellent2]

Not sure if this helps guys but here is a picture of it:

http://i41.tinypic.com/28vew5h.jpg

[kk.]

Exactly, thats why i think the questions wrong

if you think its 12, you have two values for D, 4 and 12.. yeh
so you can just keep going on forever, 12 + 8 = 20,

so now you have 4 , 12 , 20, unless you want to make a sequence, so then it would be D = n*4 + 8 where n is the term number lol

[buttons]

A = 16 + 2 x 4
16 + 8 = 24.
(8/2 = 4)
24 / 4 = 6

A = 16 + (4 x 2)
16 + 8
24
divide by
8 x 4 + 2
34
34

so 24 divide by 34 whatever that is :S

4 = 4 + 8
the 4 crosses over to the other side and as its a multiply you divide
so 4+8 = 12
divide by 4
3


HOW COME YOU ALL GOT DIFF :@:@:@ i have no idea how u all got that, dont listen 2 me tho

edited 2nd one i got tht wrong n prob da rest

[kk.]

jen ure wrong

[buttons]

shut up. "listen 2 me im right" kk mr mathematician but its how i learnt it :)

[kk.]

haha, but your way is soooo confusing, just plug the numbers into a calculator and remember to use bodmas if youre doing it in steps :P

but yes, i am a genius

[kk.]

btw, i askled my maths teacher about D = D + E and she said that E = 0, which is pretty much what i said