Oefen de erbijsommen tot 50

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

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