我有15支 ，给妹妹7支，我还剩几支？6t1e:K9A+K
算式：提示.z;_'^8|0`/j4Z,{6t1e:K9A+K
答：我还剩'k8k5g/O*L(P1S;?8n:A支。6t1e:K9A+K
6t1e:K9A+K