Oefen de erbijsommen tot 50

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

Oefen de erbijsommen tot 50
| ANTWOORDEN

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