Question

What is 15-10+2/5*-2

Answer 1

At the risk of this being a trick question, is it
\[\Large 15 -10 +\frac25\times-2\]?

Answer 2

I think so..

Answer 3

OR
\[\Large 15 -10+2\div5\times-2\]

Answer 4

Here first multiply -2 with 2/5..

Answer 5

It might not actually matter either way :)
MDAS, anyone? ^.^

Answer 6

\[\frac{2}{5} = ??\]

Answer 7

I really didn't like how MDAS is so misleading, it's actually more like
(MD) (AS)
Perform the multiplications or divisions first, whichever is leftmost
And then perform the additions and subtractions, whichever is leftmost :D

Answer 8

So, perform the division first...
\[\Large 15-10+\color{blue}{2\div5}\times-2\]

Answer 9

Either you will do multiply 2/5 with -2 or you will first divide and then multiply it with -2, you will get the same in both the cases..

Answer 10

So, let's hop to it, though I'd rather not continue unless the asker shows him/herself, first :)

Answer 11

@flying.blast your involvement is missing..

Answer 12

I am so sorry. I was taking a shower and i just finished. is is 2 divided by 5

Answer 13

so i divide first? 2/5=0.4
So what next?

Answer 14

Okay, so we now have
\[\Large 15-10+0.4\times2\]What is the next operation to perform?

Answer 15

uhhh. is it subtracting?

Answer 16

15-10=5

Answer 17

No. MDAS

Answer 18

What is MDAS?

Answer 19

multiplication division addition subtraction

Answer 20

OHHHHHHHHHH! So it is 5*-2=-10 and then 2/-10=-0.2 and then 10+(-0.2)=9.8 and 15-9.8=5.2 Am I right?

Answer 21

Take it slow :)
\[\Large 15-10+\color{blue}{0.4\times2}\]

Answer 22

oh. 15-10+0.8

Answer 23

And from there, you can pretty much do the operations in any order you want :D

Answer 24

Or not. Do the subtraction first. As it is left-most

Answer 25

15-10= 5 and then 5+0.8=5.8 Is that right?

Answer 26

That's done :)

Answer 27

Wait...

Answer 28

Thank you SO MUCH!!!

Answer 29

NO!!!

Answer 30

I forgot a minus-sign
\[\Large 15-10+\color{blue}{0.4\times-2}\]

Answer 31

ohhhhhh. So it is 4.2

Answer 32

Well THNX AGAIN!!