小明家上半年节约用水30.8吨,平均每月节约用水多少吨?1m,D)e8j4F7O
算式:提示5u4}6V5i8r2U+M4y1m,D)e8j4F7O
答:平均每月节约用水*l'|7T7r6m吨。1m,D)e8j4F7O