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