列式计算
22-19= 34-24= 90-29= 73-60=
70-45= 96-44= 59-28= 98-38=
88-14= 63-15= 56-10= 89-39=
99-34= 46-14= 46-39= 94-23=
58-40= 94-50= 29-17= 81-61=
14-13= 91-20= 50-18= 53-20=
95-95= 88-64= 80-40= 44-20=
77-34= 78-67= 93-26= 72-69=
99-35= 86-48= 97-13= 54-44=