Oefen de erbijsommen tot 50

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

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