Reken de erbijsom tot 50 uit

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

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