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