Rekensommen met eraf tot 50

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

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