10
5 + 9 =
14 - 9 =
14 - 5 =
8 + 9 =
17 - 9 =17 - 8 =6 + 7 =13 - 7 =13 - 6 =12 - 6 =7 + 9 =18 - 8 =17 - 5 =5 + 6 =11 - 6 =11 - 5 =7 + 8 =15 - 7 =15 - 8 =5 + 7 =12 - 5 =12 - 7 =7 + 7 =15 - 4 =13 - 5 =14 - 7 =3 + 8 + 7 =12 - 5 - 5 =17 - 8 + 6 =4 + 3 + 7 =8 + 5 - 7 =13 - 8 + 5 =17 - 3 + 6 =14 - 5 + 6 =5 + 8 - 7 =6 + 5 + 3 =16 - 7 - 4 =16 - 8 + 2 =12 + 5 - 3 =
老鼠吃蛋糕，必须要走得数是 7 的路线，请你画一画

14
5
9
17
8
9
13
6
7
6
16
10
12
11
5
6
15
8
7
12
7
5
14
11
8
7
18
2
15
14
6
10
20
15
6
14
5
10
14
（画图部分因无法直接绘制，故此处省略，实际作答时需在图中连接得数为7的算式：12-5=7、15-8=7、14-7=7、12-7=7）