Oefen de erbijsommen tot 50

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

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