Oefen de erafsommen tot 50

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

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