Oefen de erbijsommen tot 50

Erbijsommen
1.
35
+
5
=
30
25
20
40
2.
10
+
10
=
25
10
20
30
3.
40
+
0
=
25
35
30
40
4.
25
+
25
=
40
50
45
35
5.
15
+
30
=
35
45
40
30
6.
0
+
50
=
35
45
40
50
7.
50
+
0
=
45
30
40
50
8.
40
+
0
=
35
40
25
30
9.
50
+
0
=
50
30
35
45
10.
30
+
15
=
35
45
25
40
11.
0
+
50
=
40
30
45
50
12.
30
+
0
=
35
30
20
25
13.
15
+
10
=
35
25
20
15
14.
30
+
20
=
45
35
50
40
15.
0
+
50
=
50
30
35
45
16.
0
+
50
=
35
50
45
40
17.
10
+
5
=
10
25
15
20
18.
0
+
35
=
30
35
40
25
19.
40
+
5
=
30
35
40
45
20.
35
+
5
=
30
35
40
20
21.
15
+
35
=
40
50
35
30
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Oefen de erbijsommen tot 50
| ANTWOORDEN

Erbijsommen
1.
35
+
5
=
30
25
20
40
2.
10
+
10
=
25
10
20
30
3.
40
+
0
=
25
35
30
40
4.
25
+
25
=
40
50
45
35
5.
15
+
30
=
35
45
40
30
6.
0
+
50
=
35
45
40
50
7.
50
+
0
=
45
30
40
50
8.
40
+
0
=
35
40
25
30
9.
50
+
0
=
50
30
35
45
10.
30
+
15
=
35
45
25
40
11.
0
+
50
=
40
30
45
50
12.
30
+
0
=
35
30
20
25
13.
15
+
10
=
35
25
20
15
14.
30
+
20
=
45
35
50
40
15.
0
+
50
=
50
30
35
45
16.
0
+
50
=
35
50
45
40
17.
10
+
5
=
10
25
15
20
18.
0
+
35
=
30
35
40
25
19.
40
+
5
=
30
35
40
45
20.
35
+
5
=
30
35
40
20
21.
15
+
35
=
40
50
35
30
© JuniorEinstein.nl
Online oefenen  |   Educatieve boeken  |   Werkbladen  |   Educatieve materialen