文档介绍：2+1 =
11+1=
7+8=
3+2=
16-5=
12+3=
6+7=
16+2=
18-10=
6+5=
19-15=
17+1 =
2+7=
14+3=
4-2=
13+5=
1+2=
16-16=
16+3=
10-3=
8+1 =
5+8=
6+8=
18-18=
19-19=
15-15=
5+1 =
1+3=
1+4=
7+5=
13-2=
5-2=
1+9=
2+4=
9+5=
8+9=
7-1=
10+8=
9+7=
10+5=
3+1 =
3+9=
14-3=
3+4=
14-3=
8+8=
5+5=
2+3=
5+4=
15-1=
11-10=
17-2=
3+3=
14+2=
9+8=
18-2=
6+2=
10+1=
7-6=
12+5=
10-10=
19-3=
13-2=
6+4=
14+5=
19-11 =
6-4=
4+3=
7+4=
5+9=
5+2=
19-2=
18-4=
10-7=
16-4=
18-4=
7+2=
17-2=
8+4=
2+6=
14+2=
13-1=
14-14=
7+9=
5-1 =
7+5=
10-9=
5+3=
9+4=
3-3=
18-6=
8+2=
19-4=
11+4=
12-1=
16-2=
19-6=
6+3=
19-7=
8-5=
5+8=
7-2=
9+3=
12+4=
18-4=
17+2=
5+13=
16-2=
0+8=
15-10=
9-7=
15-2=
10+3=
13+4=
8-1=
4+7=
9+2=
14-1=
9-1=
3+6=
17-6=
10-1=
15-3=
1+5=
6-3=
12-1=
2-2=
6-5=
18-8=
16-2=
11-11 =
10+2=
11+3=
17-5=
11-1=
8+7=
14-10=
8-6=
9-2=
6-1 =
9+1 =
11+2=
13+3=
4+5=
5+6=
7+6=
11+7=
17-3=
6-6=
6+9=
19-10=
12+7=
13-3=
18-7=
12-12=
8+6=
1+8=
9-3=
17-7=
14+1=
10+6=
2+8=
13-10=
9+6=
18-3=
13-13=
4+8=
8-3=
8-7=
2+5=
10-4=
19-2=
5-3=
13+1=
17-3=
6-2=
11+8=
15+1=
7-7=
17-4=
12+6=
4+7=
4-3=
19-8=
7+3=
16-3=
10+9=
2+9=
10+7=
15+4=
13+6=
12+1=
15-4=
19-4=
11+5=
1+7=
18-5=
8+5=
10-8=
17-5=
3+7=
19-1=
9+4=
9-8=
14-4=
7+6=
4+4=
4+2=
3+5=
16-5=
8