脱式计算.8.9×1.1×4.7 2.7×5.4×3.9 3.6×9.85-5.46
脱式计算.8.9×1.1×4.7 2.7×5.4×3.9 3.6×9.85-5.46 7.6+3.4×8.05 6.58×4.5×0.9 2.8×0.5+1.58