Rekensommen met eraf tot 50

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

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