1
/
20
4-2=
2
/
20
7-2=
3
/
20
4-1=
4
/
20
3-2=
5
/
20
5-3=
6
/
20
7-4=
7
/
20
9-5=
8
/
20
8-5=
9
/
20
10-7=
10
/
20
10-8=
11
/
20
5-3=
12
/
20
9-4=
13
/
20
8-6=
14
/
20
5-5=
15
/
20
7-3=
16
/
20
9-6=
17
/
20
10-3=
18
/
20
8-3=
19
/
20
10-9=
20
/
20
9-7=
