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