Question

该填“+”“-”还是“=”呢？你能告诉我吗？
90○6=84                         46○4=50                    8○62=70  
51○7=44                         40○58=98                  50○26=76  
50○10=60○20                                                   75○5○90○10

Answer 1

- ；+；+；- ；+；+；- ；- ；+；=；-