一张100百元的电话卡，用去了45元，现在电话卡里还有多少钱？9M7n(b6{:^7@9^(},i9~1W5p6}+x
算式：提示2a5T7m:A:|1].w5E9M7n(b6{:^7@9^(},i9~1W5p6}+x
答：现在电话卡里还有)I-F'y'c:e3]8U0c,c5S8I1H.y)s)E(_.x元钱。9M7n(b6{:^7@9^(},i9~1W5p6}+x