Oefen de erbijsommen tot 50

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

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