Oefen de erafsommen tot 50

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

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