La soustraction posée avec retenues
-
6  3  8
9  0  6
-
6
8
7
3
2
3
-
4
7
0
0
4
8
-
3
9
8
1
2
5
-
4
8
9
5
0
5
-
1
6
4
2
8
9
-
2
7
8
1
7
9
-
4
6
3
0
0
9
-
3
7
9
5
2
8
-
1
9
4
3
7
8
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