Oefen de erafsommen tot 50

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

Oefen de erafsommen tot 50
| ANTWOORDEN

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