Oefen de erafsommen tot 50

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

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