Hi
In B2 enter
Code:
=VLOOKUP(A2,'tab 1'!$A$2:$B$11,2,FALSE)
and pull down as needed
EDIT to be complete , in XL 2007 you can use
Code:
=iferror(VLOOKUP(A2,'tab 1'!$A$2:$B$11,2,FALSE),"")
and in XL 2003
Code:
=if(isna(VLOOKUP(A2,'tab 1'!$A$2:$B$11,2,FALSE),"",VLOOKUP(A2,'tab 1'!$A$2:$B$11,2,FALSE))