Oefen de erbijsommen tot 50

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

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