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