Oefen de erafsommen tot 50

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

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