Rekensommen met eraf tot 50

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

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