Oefen de erbijsommen tot 50

Erbijsommen
1.
10
+
10
=
2.
0
+
15
=
3.
15
+
25
=
4.
10
+
20
=
5.
20
+
30
=
6.
0
+
40
=
7.
20
+
25
=
8.
20
+
30
=
9.
0
+
30
=
10.
10
+
35
=
11.
5
+
35
=
12.
5
+
45
=
13.
0
+
5
=
14.
10
+
40
=
15.
0
+
45
=
16.
5
+
40
=
17.
5
+
10
=
18.
10
+
20
=
19.
10
+
20
=
20.
25
+
25
=
21.
0
+
40
=
22.
5
+
10
=
23.
0
+
50
=
24.
10
+
40
=
25.
5
+
30
=
26.
0
+
15
=
27.
5
+
25
=
28.
0
+
40
=
29.
20
+
30
=
30.
5
+
40
=
31.
5
+
45
=
32.
10
+
40
=
33.
5
+
40
=
34.
25
+
25
=
35.
0
+
30
=
36.
0
+
20
=
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Oefen de erbijsommen tot 50
| ANTWOORDEN

Erbijsommen
1.
10
+
10
=
20
2.
0
+
15
=
15
3.
15
+
25
=
40
4.
10
+
20
=
30
5.
20
+
30
=
50
6.
0
+
40
=
40
7.
20
+
25
=
45
8.
20
+
30
=
50
9.
0
+
30
=
30
10.
10
+
35
=
45
11.
5
+
35
=
40
12.
5
+
45
=
50
13.
0
+
5
=
5
14.
10
+
40
=
50
15.
0
+
45
=
45
16.
5
+
40
=
45
17.
5
+
10
=
15
18.
10
+
20
=
30
19.
10
+
20
=
30
20.
25
+
25
=
50
21.
0
+
40
=
40
22.
5
+
10
=
15
23.
0
+
50
=
50
24.
10
+
40
=
50
25.
5
+
30
=
35
26.
0
+
15
=
15
27.
5
+
25
=
30
28.
0
+
40
=
40
29.
20
+
30
=
50
30.
5
+
40
=
45
31.
5
+
45
=
50
32.
10
+
40
=
50
33.
5
+
40
=
45
34.
25
+
25
=
50
35.
0
+
30
=
30
36.
0
+
20
=
20
© JuniorEinstein.nl
Online oefenen  |   Educatieve boeken  |   Werkbladen  |   Educatieve materialen