文档介绍：58+7=
69+5=
46+8=
75+9=
26+7=
42-9=
53-8=
46-8=
39+7=
54+6=
93-8=
54-8=
97-8=
48+5=
64-9=
73+3=
58-9=
458+7=
69+5=
46+8=
75+9=
26+7=
42-9=
53-8=
46-8=
39+7=
54+6=
93-8=
54-8=
97-8=
48+5=
64-9=
73+3=
58-9=
47+7=
29+7=
48+6=
45-9=
52-8=
73-6=
29+7=
43-8=
28+7=
45+8=
38+7=
31-8=
42-7=
92-8=
73-8=
56-3=
73-7=
83-6=
48+3=
82+9=
94-8=
76+7=
73-8=
54+8=
43+9=
48+2=
67+7=
48+3=
82-7=
85-8=
62-9=
38-9=
58+4=
93-7=
72-7=
84-9=
38+7=
94-7=
36-8=
73-6=
63-8=
45-8=
38-6=
56-9=
35-8=
84+7=
56+8=
45-9=
29+8=
34+7=
23+9=
34-8=
67-8=
54-8=
38-6=
92-7=
83-8=
77-9=
54-7=
48-9=
52-8=
26+7=
77+8=
83+6=
93-8=
67+5=
78+8=
56+9=
43+7=
87+8=
67+6=
58-7=
93-8=
56+8=
87-8=
58+8=
67-8=
88-9=
65-7=
77-8=
86-8=
98-8=
48+7=