根据下面的算式各编一个文字题。+_4A+a+m/N+H4j0k4n'a4Z
1.3.87＋（17.57－12.43）+_4A+a+m/N+H4j0k4n'a4Z
算式：提示(m)P)e'n0s;D2k7w+_4A+a+m/N+H4j0k4n'a4Z
2.4÷〔（1.24＋0.76）×0.4〕+_4A+a+m/N+H4j0k4n'a4Z
算式：提示1c:u(S,d)Y6b+_4A+a+m/N+H4j0k4n'a4Z