How do you find the sum #-12+18+(-12)#?

1 Answer
Jan 4, 2017

#-6#

Explanation:

#-1 xx -1 = +1#

#+1 xx -1 =-1#

#-12+18+(-12)#

#6-12=-6

#the plus b#

The plus sign before the bracket and the minus sign after
the bracket means it's a plus #xx# a minus sign.