Reken de erafsommen tot 50 uit

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

Reken de erafsommen tot 50 uit
| ANTWOORDEN

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