Oefen de erbijsommen tot 50

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

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