Oefen de erbijsommen tot 50

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

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