Rekensommen met eraf tot 50

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

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