7.5+(−9.5)+5+(−13.5)=?
Let's begin by expanding the parentheses whilst paying attention to the minus and plus signs, which change accordingly:
+(−9.5)=−9.5
+(−13)=−13
We should obtain the following:
7.5−9.5+5−13.5=
Now let's solve the exercise from left to right:
−2+5−13.5=
3−13.5=−10.5