Rekensommen met eraf tot 50

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

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