商店有熊猫玩具31只，卖掉7只，现在有多少只?7Y9f+{*`'w*r7]
算式：提示*c+c(?6P'd-e2R3c7g'z5o,r5B7Y9f+{*`'w*r7]
口答：现在有-]6@3E9F,O'|;x3I6H8O-G4R)T)j4P1T只。7Y9f+{*`'w*r7]