3.5÷1

1

3

+6.5×[12×(1

1

3

−0.3)−0.15]
=3.5÷1

1

3

+6.5×[12×1

1

3

-12×0.3-0.15]
=2.625+6.5×[16-3.6-0.15]
=2.625+6.5×[12.4-0.15]
=2.625+6.5×12.25
=2.625+79.625
=82.25．
故答案为：82.25．