Erbijsom en erafsom maken tot 20
In de mix
1.
15
14
–
=
2.
46
0
+
=
3.
23
9
–
=
4.
25
25
–
=
5.
39
20
–
=
6.
18
13
–
=
7.
45
35
–
=
8.
3
21
+
=
9.
50
26
–
=
10.
15
22
+
=
11.
18
1
–
=
12.
22
5
+
=
13.
21
1
+
=
14.
33
25
–
=
15.
14
14
+
=
16.
13
34
+
=
17.
8
2
+
=
18.
23
10
+
=
19.
21
4
+
=
20.
2
48
+
=
21.
33
2
–
=
22.
23
15
–
=
23.
9
5
–
=
24.
18
26
+
=