negative numbers

Arexsis · #1 $Old$ 10-12-2008, 07:18 PM

if i had -2x-6 ut would be +12 right?

Shyam · #2 $Old$ 10-12-2008, 07:25 PM

Quote:

Originally Posted by Arexsis $View Post$

if i had -2x-6 ut would be +12 right?

yes

$(-2) \times (-6) = +12$

mack · #3 $Old$ 10-15-2008, 01:42 PM

Hi,
can anyone tell me that why is pie value 22/7?
and why 0 came when we devide any interger to 0
____________________________________________
medium format digital general dentistry raleigh

Shyam · #4 $Old$ 10-15-2008, 01:55 PM

Quote:

Originally Posted by mack $View Post$

Hi,
can anyone tell me that why is pie value 22/7?
and why 0 came when we devide any interger to 0
____________________________________________
medium format digital general dentistry raleigh

$\pi = 3.14159 \approx \frac {22}{7} \approx \frac{355}{113}$

Read about pi on this article Pi - Wikipedia, the free encyclopedia

Shyam · #5 $Old$ 10-15-2008, 01:58 PM

Quote:

Originally Posted by mack $View Post$

Hi,
why 0 came when we devide any interger to 0
____________________________________________
medium format digital general dentistry raleigh

$\frac{0}{\text{any number}}=0$

HallsofIvy · #6 $Old$ 10-19-2008, 06:05 AM

Quote:

Originally Posted by mack $View Post$

Hi,
can anyone tell me that why is pie value 22/7?

Strictly speaking, pi is NOT 22/7 but it is close. pi is, according to the calculator that comes with MicroSoft Windows, 3.1415926535897932384626433832795 while 22/7 is 3.1428571428571428571428571428571.

Neither of those is exactly equal to pi but the first is correct to 31 decimal places and 22/7 is correct to 3 decimal places.

Quote:

and why 0 came when we devide any interger to 0
____________________________________________
medium format digital general dentistry raleigh

I assume that "divide any integer to 0" means "divide any integer BY 0".

Division is the "reverse" of multiplication. Saying that "a/b= c" means "a= bc". If a= 0 then bc must equal 0. As long as b itself is not 0 the only way we can have bc= 0 is if c= 0: 0/a= 0.

Warning: notice requirement "As long as b itself is not 0". If b were equal to 0, then bc would be 0 no matter what we took c to be: we would not get any one answer for 0/0! It is not true that "0 divided by anything is 0". "0 divided by 0" is not ANYTHING- we cannot divide BY 0.