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