Oefen de erbijsommen tot 50

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

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