Reken de erafsom tot 50 uit

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

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