Oefen de erafsommen tot 50

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

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