Oefen de erafsommen tot 50

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

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