4.5+12.5+10.5−13.5=? 4.5+12.5+10.5-13.5=\text{?} 4.5+12.5+10.5−13.5=?
Let's solve the exercise from left to right since we are only dealing with addition and subtraction operations:
4.5+12.5=17 4.5+12.5=17 4.5+12.5=17
17+10.5=27.5 17+10.5=27.5 17+10.5=27.5
27.5−13.5=14 27.5-13.5=14 27.5−13.5=14
14 14 14