Erbijsommen en erafsommen tot 50
In de mix
1.
30
20
–
=
2.
20
15
+
=
3.
45
25
–
=
4.
15
10
+
=
5.
25
25
+
=
6.
50
30
–
=
7.
10
5
+
=
8.
20
20
+
=
9.
20
5
+
=
10.
30
25
–
=
11.
20
15
–
=
12.
15
15
+
=
13.
45
35
–
=
14.
30
25
–
=
15.
45
5
+
=
16.
20
15
–
=
17.
35
25
–
=
18.
35
10
+
=
19.
30
20
+
=
20.
30
15
–
=
21.
25
25
+
=
22.
45
25
–
=
23.
10
5
+
=
24.
10
5
+
=