Oefen de erbijsommen tot 50

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

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