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