Maak de erbijsom tot 50

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

Erbijsommen
1.
20
+
10
=
30
2.
40
+
10
=
50
3.
50
+
0
=
50
4.
15
+
15
=
30
5.
25
+
20
=
45
6.
35
+
15
=
50
7.
35
+
5
=
40
8.
30
+
15
=
45
9.
50
+
0
=
50
10.
30
+
10
=
40
11.
25
+
25
=
50
12.
45
+
0
=
45
13.
25
+
20
=
45
14.
20
+
15
=
35
15.
50
+
0
=
50
16.
30
+
15
=
45
17.
45
+
5
=
50
18.
50
+
0
=
50
19.
35
+
10
=
45
20.
50
+
0
=
50
21.
15
+
5
=
20
22.
35
+
10
=
45
23.
25
+
5
=
30
24.
15
+
5
=
20
25.
25
+
20
=
45
26.
10
+
5
=
15
27.
30
+
10
=
40
28.
40
+
10
=
50
29.
30
+
5
=
35
30.
35
+
5
=
40
31.
20
+
10
=
30
32.
30
+
15
=
45
33.
50
+
0
=
50
34.
15
+
5
=
20
35.
45
+
0
=
45
36.
50
+
0
=
50
© JuniorEinstein.nl
Online oefenen  |   Educatieve boeken  |   Werkbladen  |   Educatieve materialen