Page 81 - aljaber

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[AJHSME 1996] ( )

1 − 2 − 3 + 4 + 5 − 6 − 7 + 8 + 9 − 10 − 11 + 12 + 13 −
+ 1992 + 1993 − 1994 − 1995 + 1996

1() 0( ) −1 ( ) −998 ( )
0.26 ( )
1+ 9 + 9 + 7 [AJHSME 1997] ( )
10 100 1000 10000 )

0.1997 ( ) 0.0197 ( ) 0.0026 ( )

[AJHSME 1997] (

. 200

380 ( ) 220 ( ) 202 ( ) 200 ( )
0.907 ( )
0.9709 ( ) [AJHSME 1997] ( )
)
a +b 0.979 ( ) 0.97 ( )

[AJHSME 1997] (

3×4×5×6× ×a = 9
2345 b

35 ( ) 17 ( ) 13 ( ) 11 ( )

43 ( ) 2( ) 3+7 [AJHSME 1998] ( )
88 )
20 ) 1 ()
4 [AJHSME 1998] (

5

25 (

16

100 ×19.98 ×1.998 ×1000