Oefen de erafsommen tot 50

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

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