Oefen de erbijsommen tot 50

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

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