<<<
49+860 56+3092-8 6元8角7元4角
73-565 65-2037+9 5角6分4角9分
17-8= 11-3= 20+5= 3+40=
4+20= 7+60= 68-8= 15-8=
89-9= 6+8= 16-9= 30+6=
94-4= 50+6= 54-4= 78-8+3=