Oefen de erbijsommen tot 50

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

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