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