Erbijsommen en erafsommen tot 50
In de mix
1.
50
25
–
=
2.
15
10
+
=
3.
45
15
–
=
4.
15
5
+
=
5.
20
15
–
=
6.
15
0
+
=
7.
15
5
+
=
8.
30
20
–
=
9.
45
15
–
=
10.
35
25
–
=
11.
40
15
–
=
12.
50
35
–
=
13.
20
15
–
=
14.
25
15
+
=
15.
10
5
+
=
16.
15
5
+
=
17.
30
15
–
=
18.
45
20
–
=
19.
10
5
+
=
20.
35
25
–
=
21.
10
5
+
=
22.
20
15
–
=
23.
30
20
–
=
24.
20
5
+
=