共30题 用时5分钟
54-0=
39-35=
43+50=
19-5=
58-19=
92-12=
89-28=
69-64=
49-45=
19+1=
54-1=
2+22=
29-17=
60+13=
63+6=
42-35=
66+13=
0+96=
91-73=
40-32=
76-30=
62+17=
15-2=
99-92=
85-24=
35-3=
46-23=
24+46=
88-78=
