arithmetic operations

[Alexander Kshevetskiy]

Configuration Information [Automatically generated, do not change]:
Machine: i686
OS: linux-gnu
Compiler: i686-pc-linux-gnu-gcc
Compilation CFLAGS:  -DPROGRAM='bash' -DCONF_HOSTTYPE='i686' 
-DCONF_OSTYPE='linux-gnu' -DCONF_MACHTYPE='i686-pc-linux-gnu' 
-DCONF_VENDOR='pc' -DLOCALEDIR='/usr/share/locale' -DPACKAGE='bash' -DSHELL 
-DHAVE_CONFIG_H   -I.  -I. -I./include -I./lib   -O2 -march=athlon-xp 
-fomit-frame-pointer
uname output: Linux radio 2.6.14-gentoo-r2 #3 PREEMPT Wed Dec 14 22:38:58 MSK 
2005 i686 AMD Athlon(TM) XP 1600+ AuthenticAMD GNU/Linux
Machine Type: i686-pc-linux-gnu

Bash Version: 3.1
Patch Level: 5
Release Status: release

Description:

1)
let a=(a+500)/1000
does not work after update from 3.0 to 3.1, while
let a=\(a+500\)/1000
is working

2)
a=8000; a=$[(a+500)/1000]; ---> 9
a=8000; let a=\(a+500\)/1000; ---> 8

this way, we can show that 2x2=3.