Oefen de erafsommen tot 50

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

Oefen de erafsommen tot 50
| ANTWOORDEN

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