Rekensommen met eraf tot 50

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

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