文档介绍：51-39=
52-27=
63-27=
48+23=
57-48=
54+29=
62+19=
86-54=
54+28=
27+36=
65-36=
84-48=
40-29=
48+48=
60+25=
56-28=
78-69=
72-37=
53+28=
54+37=
59+19=
55-47=
73+29=
98-56=
35+17=
60-38=
36-25=
42-19=
75-59=
24+38=
42-23=
44+39=
70+19=
16+23=
57-16=
62+12=
22+55=
46-28=
48-26=
72-54=
16+27=
43-27=
63+25=
76-37=
54-29=
79-64=
98-48=
56-36=
67-60=
85-50=
42-32=
69-31=
93-56=
23+32=
42-19=
37-25=
50+22=
62-48=
22+55=
86-45=
70-42=
72-54=
16+27=
40-12=
83-56=
76-37=
54-29=
64+36=
71-55=
56-36=
67-60=
55+38=
15+57=
39+38=
93-56=
78-29=
37+18=
47+19=
46-19=
36+27=
46-38=
65-26=
25+8=
45-16=
42-19=
74-18=
44-17=
34+58=
53-29=
63+28=
36+17=
43-25=
73+14=
36-27=
22+18=
52+16=
62-59=
52-34=
82-33=
67-28=
84+9=
29+35=
45+9=
58-29=
47+18=
47+29=
76-19=
46+27=
56-38=
75-26=
45+8=
35-16=
42-29=
74-68=
64-17=
24+58=
53-39=
43+28=
56+17=
63-25=
73+24=
56-27=
22+28=
27+16=
62-49=
62-34=
62-35=
52-17=
91-37=
36+26=
81-35=
77-28=
84+19=
39+35=
35+19=
68-39=
47+28=
67+29=
84-29=
26+17=
66-48=
85-56=
72+18=
45-36=
72-39=
78-39=
74-37=
74+18=
83-49=
83+17=
46+27=
53-35=
63+34=
64-45=
32+19=
53-35=
63+34=
64-45=
32+19=
63+37=
64+24=
53+16=
82-37=
47+19=
55+38=
40-17=
79-28=
54-45=
71-15=
61-39=
85+7=
72-45=
46-28=
72-17=
68-57=
96-59=
43-27=
76-38=
42+59=
56-27=
79-64=
75+17=
60-37=
86-58=
85-50=
48-36=
60-37=
52+23=
23+32=
53+36=
46-38=
35+17=
76-18=
42-37=
75+17=
86-45=
55+17=
63-49=
92-59=
40-12=
38-16=
42+13=
42-16=
63-37=
70-42=
75-55=
62-56=
50+22=
83-56=
15+56=
48-26=
75-33=
48+35=
38+46=
42-19=
12+29-19=
69+10-36=
27+12-28=
67+27-37=
33-17+15=
75-36+10=
72-54+12=
65-39-15=
62-18+24=
54+21+18=
53-29+19=
35+12-28=
86-12-15=
57-33+31=
36-27+9=
77-19-16=
88-34+18=
85-36+27=
12+79-62=
51-27+28=
51-42+53=
77-65-6=
71-52+36=
75-24+26=
75+24-23=
32+45-38=
8