Reken de erafsom tot 50 uit

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

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