1. (2023一下·英德期末) 看谁算的又对又快。                                                                                                                                      

13-7=	24-6=	44+9=	40+34-9=
25-7=	18+22=	36-10=	34-20+6=
71+8=	63-50=	80-30=	72-70+8=