Oefen de erafsommen tot 50

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

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