文档介绍：43-21=
40-12=
30-25=
37-15=
24-21=
44-25=
21+18=
30-2=
23+4=
33-11=
34-17=
29+12=
32-7=
6+17=
30-26=
48-40=
8+19=
25-11=
28+1=
29-18=
39+3=
22-12=
50-26=
40-16=
15+9=
30+8=
39-4=
23+25=
48-9=
23+26=
27-16=
5+37=
47-36=
44-37=
27-12=
45-7=
20-4=
34-32=
31+14=
5+27=
41-37=
26-2=
42+2=
37-12=
41-17=
31-9=
34+14=
44+2=
22-21=
20+30=
41-5=
36-11=
5+31=
18+9=
34-8=
17+33=
14+31=
50-41=
29-10=
43-3=
17+15=
1+23=
32-3=
43-5=
21-21=
36-16=
6+39=
38+8=
49-33=
23+9=
4+31=
14+7=
25+13=
21+17=
20-3=
22-1=
18+6=
15+19=
28-20=
31+14=
22-21=
36-32=
25-15=
16+31=
39+2=
4+25=
32-18=
48-13=
42+6=
36+8=
49-45=
29-21=
9+34=
27+22=
27-12=
27-3=
41-11=
32-11=
25-10=
1+25=
21-4=
43-8=
16+24=
27+16=
25-14=
28+14=
22+19=
42-35=
29+13=
6+27=
33-31=
40-11=
43-21=
40-16=
16+8=
22-17=
6+23=
42+7=
34+13=
50-2=
28+22=
4+28=
29-1=
43-19=
45+4=
35-1=
11+21=
29-23=
40-4=
48-38=
49+1=
2+28=
25+19=
20+24=
10+24=
32-9=
13+19=
8+22=
48-31=
26-22=
18+8=
29-22=
18+21=
41-24=
6+17=
12+14=
4+23=
31+13=
49-35=
36-36=
38+2=
28+13=
21-11=
36+9=
23+25=
13+13=
2+36=
35-2=
46-30=
9+12=
31+13=
35-3=
31+3=
36+1=
27-5=
37+5=
48-8=
37-3=
34-24=
17+25=
1+45=
4+20=
25-4=
15+12=
13+8=
25-14=
30-23=
5+39=
20-5=
31-16=
45-18=
28-19=
25-5=
45-14=
35-17=
17+23=
43-42=
25-20=
2+27=
26-25=
49-36=
21-9=
4+42=
22+1=
46-29=
29+19=
28-18=
26-12=
25-22=
28-1=
21+14=
40-23=
7+40=
30+5=
12+29=
23+5=
43-21=
1+45=
35-20=
32-12=
38-12=
25-12=
40-5=
44-30=
24-14=
17+17=
4+18=
25+1=
5+17=
20+23=
37-20=
31+19=
26-4=
23+11=
24-10=
13+8=
30+1=
29-11=
30-18=
37+12=
11+21=
21-13=
9+39=
31-20=
29-8=
25-9=
34-32=
50-30=
4+38=
20-17=
37-24=
38+8=
38+8=
23-17=
24-9=
17+25=
30-14=
6+21=
46+1=
37+4=
2+40=
24-22=
46-27=
4+31=
6+16=
20-12=
4+33=
48-34=
21-14=
39-14=
29-14=
40+5=
3