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×− + [AJHSME 1993] ( )
5463
:
19 ( ) 15 ( ) 10 ( ) 9 ()
()
1, 2, 3
: A + B 1,2, 3
1
2A
B
5() 4( ) 3( ) 2 ()
5 ()
7() 1 [AJHSME 1993] ( )
6 1+ 1 )
10 ) 1 ()
1093 − 93 2+1
3 6
3( [AJHSME 1993] (
10
826 ( ) 819 ( ) 93 ( ) 10 ( )
[AJHSME 1994] ( )