Page 79 - aljaber

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:N

1991 ( ) 1990 ( ) 6( ) 3 ()

[AJHSME 1992] ( )

10 − 9 + 8 − 7 + 6 − 5 + 4 − 3 + 2 − 1

1−2+ 3−4 +5−6+7−8+9

9 ( ) 5 ( ) 1 ( ) −1 ( )

. 9 + 9 + 8 = 26 998 [AJHSME 1992] ( )

3

26

4() 3( ) 2( ) 1 ()

36 [AJHSME 1993] ( )
)
{1, 36} ( )  1 , −72  ( ) {−3,−12} ( ) {−4,−9} ( )
2

49 [AJHSME 1993] (

84

33 ( ) 19 ( ) 17 ( ) 11 ( )

1000 ×1993 × 0.1993 ×10 [AJHSME 1993] ( )

(1993)2 ( ) (199.3)2 ( ) 1993.1993 ( ) 1.993 ×103 ( )
273 ( ) 39 ( )
[AJHSME 1993] 33 + 33 + 33 ( )
)
93 ( ) 34 ( )

[AJHSME 1993] (