Oefen de erbijsommen tot 50

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

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