Rekensommen met eraf tot 50

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

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