Oefen de erafsommen tot 50

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

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