Oefen de erbijsommen tot 50

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

Oefen de erbijsommen tot 50
| ANTWOORDEN

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