Oefen de erbijsommen tot 50

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

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