文档介绍：4+7=
8+3=
9+4=
5+8=
9+3=
16-7=
6+9=
17-8=
9+4=
8+5=
3+8=
13-6=
8+4=
6+7=
12-8=
15-6=
6+8=
14-9=
8+6=
4+7=
5+9=
2+9=
12-8=
6+7=
5+7=
4+8=
4+8=
7+8=
5+9=
16-9=
7+6=
8+5=
15-8=
13-6=
5+6=
9+3=
15-8=
6+6=
2+9=
7+9=
9+5=
4+8=
3+9=
15-7=
18-9=
17-8=
4+7=
11-5=
13-5=
5+8=
8+5=
9+8=
17-9=
9+2=
15-9=
7+8=
8+7=
3+9=
14-5=
13-7=
9+2=
14-7=
9+9=
16-7=
8+5=
9+7=
5+8=
14-5=
5+7=
8+9=
7+6=
9+5=
9+5=
12-5=
12-9=
17-9=
9+9=
16-8=
11-7=
6+9=
()+5=13
()+7=15
20-( )=9
15-( )=6
17-( )=8
()-7=5
15-( )=6
11-( )=3
()+6=15
()+8=14
17-( )=9
20-( )=9
6+( )=15
2+( )=11
15-( )=8
()-6=6
()+8=17
17-( )=9
15-( )=7
8+( )=15
8+6=
15-6=
7+5=
5+9=
16-8=
15-8=
5+9=
5+9=
5+7=
16-7=
5+9=
2+9=
14-8=
16-9=
8+9=
7+8=
8+6=
13-8=
4+9=
7+8=
11-5=
8+7=
11-5=
8+7=
11-5=
3+8=
16-8=
3+8=
16-8=
3+8=
6+5=
13-8=
6+5=
13-8=
6+5=
3+8=
8+6=
4+7=
8+7=
4+8=
14-8=
7+5=
8+4=
15-9=
3+9=
15-6=
9+3=
7+9=
8+9=
8+5=
6+8=
5+7=
16-9=
4+8=
9+5=
5+9=
16-9=
14-8=
6+7=
4+9=
6+9=
18-9=
11-6=
16-7=
7+8=
3+8=
11-8=
7+9=
9+6=
6+7=
18-9=
8+6=
5+6=
4+9=
5+9=
6+7=
3+8=
11-8=
4+7=
7+8=
15-( )=8
()+8=13
()+8=15
15-( )=8
()+7=16
8+( )=17
()-9=4
15-( )=9
8+( )=13
8+( )=17
13-( )=8
6+( )=14
8+( )=12
()+6=11
16-( )=9
8+( )=17
5+( )=13
15-( )=6
17-( )=9
6+( )=15
9+3=
5+8=
9+3=
15-8=
5+9=
5+7=
9+4=
8+5=
11-5=
8+7=
16-9=
6+7=
12-8=
5+8=
16-8=
18-9=
8+6=
4+7=
6+5=
13-8=
11-8=
4+7=
5+7=
12-8=
14-9=
8+6=
5+9=
16-9=
16-8=
2+9=
3+8=
8+4=
17-8=
8+7=
8+5=
5+9=
7+9=
8+4=
20-9=
7+6=
5+7=
16-9=
14-9=
15-8=
15-8=
16-7=
14-8=
12-8=
6+5=
15-6=
4+9=
11-6=
7+8=
9+4=
8+7=
11-7=
15-8=
13-8=
3+8=
6+7=
12-8=
6+8=
15-9=
2+9=
8+3=
5+6=
7+6=
6+8=
8+6=
7+6=
8+7=
5+9=
8+7=
4+7=
12-8=
15-9=
16-9=
4+9=
8+6=
13-9=
8+( )=12
12-( )=5
18-( )=9
8+( )=13
15-( )=8
9+( )=17
()-9=8
17-( )=