Oefen de erafsommen tot 50

Erafsommen
1.
30
-
30
=
5
10
0
20
2.
45
-
10
=
40
45
35
25
3.
10
-
10
=
10
20
0
5
4.
30
-
0
=
25
40
20
30
5.
15
-
10
=
20
5
10
25
6.
40
-
35
=
15
25
5
10
7.
50
-
45
=
25
5
15
10
8.
5
-
0
=
10
15
5
25
9.
10
-
0
=
0
15
10
20
10.
10
-
10
=
5
15
0
20
11.
5
-
0
=
5
10
25
20
12.
45
-
0
=
40
30
45
25
13.
20
-
10
=
20
10
0
5
14.
10
-
0
=
15
10
5
0
15.
15
-
5
=
20
10
15
0
16.
20
-
0
=
10
15
25
20
17.
45
-
15
=
35
25
40
30
18.
25
-
25
=
0
10
15
20
19.
45
-
5
=
40
25
20
35
20.
5
-
0
=
20
5
15
25
21.
10
-
0
=
15
0
20
10
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Oefen de erafsommen tot 50
| ANTWOORDEN

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