Oefen de erbijsommen tot 50

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

Oefen de erbijsommen tot 50
| ANTWOORDEN

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