Oefen de erafsommen tot 50

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

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