Oefen de erafsommen tot 50

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

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