Oefen de erafsommen tot 50

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

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