Rekensommen met eraf tot 50

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

Rekensommen met eraf tot 50
| ANTWOORDEN

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