Rekensommen met eraf tot 50

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

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