(0.5+0.05)×2×1.2=(1+0.1)×1.2=1.2+0.12=1.32
3.3÷0.55×0.8÷1.2=3.3÷(1.1×0.5)×0.8÷1.2=3.3÷1.1÷0.5×0.8÷1.2=3÷0.5×0.8÷1.2=3×0.8÷1.2÷0.5=2.4÷1.2÷0.5=2÷0.5=4希望能解决您的问题。