Oefen de erbijsommen tot 50

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

Oefen de erbijsommen tot 50
| ANTWOORDEN

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