Oefen de erafsommen tot 50

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

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