Reken de erafsom tot 50 uit

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

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