Oefen de erbijsommen tot 50

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

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