Snelle erbijsommen en erafsommen tot 50
In de mix
1.
25
20
–
=
2.
20
10
+
=
3.
10
5
+
=
4.
45
20
–
=
5.
15
0
+
=
6.
15
10
+
=
7.
25
20
–
=
8.
35
25
–
=
9.
30
5
+
=
10.
45
25
–
=
11.
15
5
+
=
12.
40
25
–
=
13.
15
0
+
=
14.
20
10
+
=
15.
30
25
–
=
16.
25
20
–
=
17.
15
25
+
=
18.
40
35
–
=
19.
20
10
+
=
20.
30
15
–
=
21.
15
10
+
=
22.
15
5
+
=
23.
15
5
+
=
24.
15
35
+
=