一箱牛奶20袋,320箱牛奶一共多少袋?4x;L0[5T)L7};m1n(}.Q,f1c
算式:提示:U3~2E9m(R1Z*d.k8p4x;L0[5T)L7};m1n(}.Q,f1c
答:320箱牛奶一共3v0Q6I4l9W;I6z7Y1X.\)R,t+s袋.4x;L0[5T)L7};m1n(}.Q,f1c