what is the answer to 7.5+(4.8+9.9)=
7.5+4.8+9.9=22.2. The parentheses, in this case, do not effect the calculation.
First you do the 4.8 + 9.9. This equals 14.7then you add 14.7 to the 7.5.You get 22.2. There is your answer!