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