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