Oefen de erbijsommen tot 50

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

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