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