Oefen de erbijsommen tot 50

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

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