Oefen de erafsommen tot 50

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

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