Rekensommen met eraf tot 50

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

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