Rekensommen met eraf tot 50

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

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