Oefen de erbijsommen tot 50

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

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