Oefen de erbijsommen tot 50

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

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