Oefen de erafsommen tot 50

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

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