张大伯家有8袋化肥，每袋重50千克，用去315千克，还剩多少千克？6T5P;}2i:c:{0n'X9y8H
算式：提示/~7]1m-j'J;?3b'S6T5P;}2i:c:{0n'X9y8H
答：还剩0U3e(t.z千克。6T5P;}2i:c:{0n'X9y8H