Oefen de erafsommen tot 50

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

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