Oefen de erbijsommen tot 50

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

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