Rekensommen met eraf tot 50

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

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