Oefen de erbijsommen tot 50

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

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