Erbijsom en erafsom maken tot 20
In de mix
1.
18
16
–
=
2.
18
1
+
=
3.
15
12
–
=
4.
11
1
+
=
5.
14
1
+
=
6.
12
1
+
=
7.
12
0
+
=
8.
18
1
+
=
9.
12
2
+
=
10.
18
1
+
=
11.
13
7
+
=
12.
15
13
–
=
13.
14
13
–
=
14.
19
14
–
=
15.
13
6
+
=
16.
14
13
–
=
17.
20
14
–
=
18.
14
13
–
=
19.
17
14
–
=
20.
17
12
–
=
21.
13
12
–
=
22.
17
14
–
=
23.
12
6
+
=
24.
12
0
+
=