学校买松树苗花了85元，柳树苗比松树苗便宜20元，买柳树苗花了多少钱？拿100元钱去买松树苗，应找回多少钱？'S7v'O6C/a(c3}/r5r.R+C+i'n.Z
算式：提示'E2t2Z2e+l2Z*H6B+u8h9c3b6_'S7v'O6C/a(c3}/r5r.R+C+i'n.Z
答：买柳树苗花了1_5m7u'g7c1v(j元钱。'S7v'O6C/a(c3}/r5r.R+C+i'n.Z
算式：提示4m4S2X+a)j:H/~*f8f(l8]'S7v'O6C/a(c3}/r5r.R+C+i'n.Z
答：应找回.O-p+E9U4o1O4x+c1m4o4_6A(B;x元钱。'S7v'O6C/a(c3}/r5r.R+C+i'n.Z