Oefen de erbijsommen tot 50

Erbijsommen
1.
0
+
20
=
2.
20
+
25
=
3.
15
+
30
=
4.
0
+
25
=
5.
10
+
20
=
6.
5
+
40
=
7.
5
+
20
=
8.
5
+
30
=
9.
0
+
20
=
10.
5
+
40
=
11.
5
+
30
=
12.
10
+
35
=
13.
0
+
5
=
14.
5
+
45
=
15.
0
+
45
=
16.
25
+
25
=
17.
0
+
25
=
18.
5
+
45
=
19.
15
+
35
=
20.
0
+
45
=
21.
5
+
40
=
22.
5
+
20
=
23.
5
+
15
=
24.
20
+
20
=
25.
10
+
40
=
26.
5
+
30
=
27.
5
+
35
=
28.
0
+
10
=
29.
10
+
35
=
30.
5
+
15
=
31.
0
+
15
=
32.
5
+
40
=
33.
5
+
45
=
34.
5
+
45
=
35.
5
+
35
=
36.
5
+
10
=
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Oefen de erbijsommen tot 50
| ANTWOORDEN

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