Rekensommen met eraf tot 50

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

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