Solve the following equation:
(−8)+(+12)= ? (-8)+(+12)=\text{ ?} (−8)+(+12)= ?
First, let's remember the rule:
+(+x)=+x +(+x)=+x +(+x)=+x
Now let's write the exercise in the following way:
−8+12= -8+12= −8+12=
We'll draw a number line and place minus 8 on it, then move 12 steps to the right:
-1-1-1-4-4-4-3-3-3-2-2-2-5-5-5-6-6-6-8-8-8-7-7-7444000111222333
Therefore:
−8+12=4 -8+12=4 −8+12=4
4 4 4