Erbijsom en erafsom maken tot 100
In de mix
1.
20
10
+
=
2.
20
10
+
=
3.
30
20
–
=
4.
60
30
–
=
5.
70
20
+
=
6.
60
20
–
=
7.
10
10
+
=
8.
20
10
+
=
9.
20
0
+
=
10.
40
30
–
=
11.
40
30
–
=
12.
60
50
–
=
13.
20
20
+
=
14.
30
70
+
=
15.
30
60
+
=
16.
60
20
–
=
17.
20
20
+
=
18.
50
30
–
=
19.
50
50
+
=
20.
30
20
–
=
21.
80
50
–
=
22.
20
10
+
=
23.
30
20
–
=
24.
50
30
–
=