清清有20张手工纸，用了6张叠纸船，现在还剩几张？9v:W)u(j2r.\4d
算式：提示'k'_9M/S1a:T;c2K8u+b9v:W)u(j2r.\4d
答：现在还剩-P0o/Y*\1s7}:C,g*q.?张。9v:W)u(j2r.\4d