Oefen de erafsommen tot 50

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

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