Oefen de erbijsommen tot 50

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

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