Oefen de erafsommen tot 50

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

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