鲁班书上下册【50道混合运算】65.（3.2×1.5+2.5）÷1.6（2.5－0.25）×0.49.16×1.5－0.5×9.163.6－3.6×0.557.0.69×1.9+0.32×1.9鲁班书上下册3.5×101-3.53.5×9.9+3.5×0.13.5×2.7...