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