Oefen de erbijsommen tot 50

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

Oefen de erbijsommen tot 50
| ANTWOORDEN

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