Reken de erafsom tot 50 uit

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

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