1:(1 + 10) × 3 - 92:((1 + 10) × 3) - 93:(3 × (1 + 10)) - 94:3 × (1 + 10) - 95:(3 × (10 + 1)) - 96:3 × (10 + 1) - 97:(10 + 1) × 3 - 98:((10 + 1) × 3) - 9楼主,你确定你数学位置没记错?我上面是用电...