Posted by Sol on October 01, 2002 at 03:27:06:
In Reply to: Re: Negative Numbers... posted by Denis Borris on October 01, 2002 at 03:18:13:
: : Ok I have been working with this for some time now and the answer I get time and time gain is different from the answer in the answer sheet.
: : Problem:
: : -5*6+(-15)*(-3)+(-9)=??
: : The answer I get is: 126
: : The answer sheets gives the answer as: 6
: Always do multiplications first:
: -5*6 = -30
: (-15)*(-3) = 45
: SO: -30 + 45 - 9 = 6 : +(-9) is same as simply -9
: How in hell did you get 126?!
: Are you paying attention in class??
I see now my problem was in NOT doing the multiplication first.
This is how I got 126
-5 * 6 = -30
-30 + -15 = -45
-45 * -3 = 135 + -9 = 126