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