Oefen de erbijsommen tot 50

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

Oefen de erbijsommen tot 50
| ANTWOORDEN

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