Oefen de erafsommen tot 50

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

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