Reken de erbijsom tot 50 uit

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

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