1、(150-150*2/5)*2/5=90*2/5=36(袋)
2、[2/3-(2/3)*(1/4)]* 2/3=1/2*2/3=1/3(吨)
3、 (2/3-1/4)*2/3=(8/12-3/12)*2/3=5/12*2/3=5/18(吨)