Oefen de erafsommen tot 50

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

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