Oefen de erafsommen tot 50

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

Oefen de erafsommen tot 50
| ANTWOORDEN

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