Reken de erafsom tot 50 uit

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

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