共30题 用时5分钟
47-4=
61+7=
26+0=
57-2=
38-4=
76+1=
59-6=
11+2=
12+6=
49-2=
49-5=
95-4=
68-7=
55+3=
22+2=
19-7=
54-2=
22+7=
55+5=
98+0=
41+2=
89-1=
88+0=
93+6=
58-1=
38-3=
38+1=
39-9=
46+3=
16-3=