Oefen de erafsommen tot 50

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

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