Rekensommen met eraf tot 50

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

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