Oefen de erbijsommen tot 50

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

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