Reken de erafsom tot 50 uit

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

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