一台拖拉机上午耕地8/9公顷，下午耕地7/9公顷，一共耕地多少公顷？7R'n.Y+c/`,H9Z+@6A5K7D.f
算式：提示0k0A*I;p7R'n.Y+c/`,H9Z+@6A5K7D.f
答：一共耕地3W*M-v-w'm5g5j8P-^5n:h8\'w公顷。7R'n.Y+c/`,H9Z+@6A5K7D.f