52-742-9 35-636-7 72+2724+8
24-935-17 71-2584-16 21+3548+26
32-726 58 + 454 75+66+75
60-40 = 24-14 = 59-30= 46-3+8=
62-8 = 27+9= 17+6= 76+6-8=
①36+48=
②73-37=
③53+26=
④92-58+27=
⑤23+29+31=
⑥91-34-49=