Reken de erafsom tot 50 uit

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

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