Oefen de erafsommen tot 50

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

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