Oefen de erbijsommen tot 50

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

Oefen de erbijsommen tot 50
| ANTWOORDEN

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