Oefen de erafsommen tot 50

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

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