Reken de erafsommen tot 50 uit

Erafsommen
1.
45
-
45
=
20
0
2.
45
-
30
=
15
20
3.
30
-
5
=
35
25
4.
20
-
10
=
15
10
5.
45
-
15
=
30
35
6.
30
-
5
=
25
20
7.
50
-
20
=
40
30
8.
45
-
10
=
35
25
9.
5
-
0
=
20
5
10.
5
-
0
=
5
15
11.
30
-
5
=
25
20
12.
10
-
10
=
20
0
13.
25
-
5
=
20
25
14.
50
-
20
=
40
30
15.
40
-
0
=
25
40
16.
40
-
15
=
25
20
17.
25
-
10
=
5
15
18.
10
-
5
=
20
5
19.
5
-
0
=
5
20
20.
5
-
5
=
10
0
21.
10
-
0
=
0
10
22.
5
-
5
=
0
10
23.
40
-
40
=
0
20
24.
40
-
15
=
25
15
25.
25
-
5
=
30
20
26.
40
-
40
=
0
5
27.
50
-
5
=
45
25
28.
25
-
5
=
20
10
© JuniorEinstein.nl
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Reken de erafsommen tot 50 uit
| ANTWOORDEN

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