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