Rekensommen met eraf tot 50

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

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