Reken de erbijsom tot 50 uit
Erbijsommen
1.
30
+
15
=
2.
45
+
5
=
3.
30
+
0
=
4.
20
+
25
=
5.
0
+
45
=
6.
5
+
30
=
7.
50
+
0
=
8.
10
+
35
=
9.
0
+
50
=
10.
25
+
10
=
11.
5
+
30
=
12.
40
+
0
=
13.
25
+
15
=
14.
25
+
15
=
15.
25
+
25
=
16.
50
+
0
=
17.
10
+
40
=
18.
25
+
15
=
19.
5
+
5
=
20.
40
+
0
=
21.
5
+
25
=
22.
20
+
0
=
23.
0
+
30
=
24.
25
+
5
=
25.
5
+
15
=
26.
10
+
30
=
27.
0
+
40
=
28.
0
+
50
=
29.
10
+
5
=
30.
10
+
35
=
31.
35
+
0
=
32.
40
+
10
=
33.
0
+
40
=
34.
35
+
5
=
35.
35
+
5
=
36.
25
+
5
=