Oefen de erafsommen tot 50

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

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