Oefen de erafsommen tot 50

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

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