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