Oefen de erbijsommen tot 50

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

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