Rekensommen met eraf tot 50

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

Rekensommen met eraf tot 50
| ANTWOORDEN

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