Oefen de erafsommen tot 50

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

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