Oefen de erafsommen tot 50

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

Oefen de erafsommen tot 50
| ANTWOORDEN

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