Oefen de erbijsommen tot 50
Erbijsommen
1.
25
+
0
=
25
15
35
30
2.
15
+
20
=
35
30
25
45
3.
35
+
5
=
40
30
35
25
4.
0
+
25
=
35
25
15
30
5.
30
+
15
=
25
35
40
45
6.
0
+
50
=
50
45
30
35
7.
30
+
20
=
40
30
35
50
8.
30
+
0
=
25
40
20
30
9.
10
+
20
=
40
20
30
35
10.
5
+
45
=
40
35
50
45
11.
30
+
15
=
40
25
45
30
12.
10
+
35
=
35
40
45
30
13.
5
+
0
=
10
25
5
15
14.
15
+
35
=
35
50
45
30
15.
45
+
0
=
30
25
35
45
16.
25
+
15
=
25
40
30
35
17.
30
+
5
=
45
35
25
40
18.
0
+
5
=
5
25
10
15
19.
0
+
45
=
45
40
25
30
20.
20
+
30
=
50
30
45
40
21.
35
+
15
=
35
50
30
45
Oefen de erbijsommen tot 50
| ANTWOORDEN
Erbijsommen
1.
25
+
0
=
25
15
35
30
2.
15
+
20
=
35
30
25
45
3.
35
+
5
=
40
30
35
25
4.
0
+
25
=
35
25
15
30
5.
30
+
15
=
25
35
40
45
6.
0
+
50
=
50
45
30
35
7.
30
+
20
=
40
30
35
50
8.
30
+
0
=
25
40
20
30
9.
10
+
20
=
40
20
30
35
10.
5
+
45
=
40
35
50
45
11.
30
+
15
=
40
25
45
30
12.
10
+
35
=
35
40
45
30
13.
5
+
0
=
10
25
5
15
14.
15
+
35
=
35
50
45
30
15.
45
+
0
=
30
25
35
45
16.
25
+
15
=
25
40
30
35
17.
30
+
5
=
45
35
25
40
18.
0
+
5
=
5
25
10
15
19.
0
+
45
=
45
40
25
30
20.
20
+
30
=
50
30
45
40
21.
35
+
15
=
35
50
30
45