(+2) - (+6) + (-2)=
(-2) - (-15) + (-4)=
And we also did questions 21,22,23,27,29,30,32,35,37,39,40 on page 48,
and questions 9,10,14,15,21,23,and 25 on page 49.
The technique we used was this-
e.g., the question is:
(-5) - (+5) =
We would first change the minus sign to a plus sign, and change the plus in front of the five to a minus sign, and then you solve it.
(-5) + (-5) = (-10)
We do this for any problem with a minus sign.
We use this for all of the questions assigned.