Oefen de erafsommen tot 50

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

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