Oefen de erafsommen tot 50

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

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