Oefen de erbijsommen tot 50

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

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