Rekensommen met eraf tot 50

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

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