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