4.66 ×0.28×0.28-4.66=4.66×（0.28×0.28-1）=4.66× （-0.9216）=-4.23936不过题目貌似有问题4.66*0.28+0.466*8.2-4.66=4.66x0.28+4.66x0.1x8.2-4.66=4.66x(0.28+0.82-1)=4.66x0.1=0.466
