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