The US didn't print any $2 bills dated 1981. Please check again and post a new, separate question.
20,000 dollar
Unless it is a "proof" coin (actual silver), it is worth one dollar.
It is worth $100. It has no collector value at this time. Perhaps if you save it for another 30 years it might go up in value.
Unfortunately, Series 1981A $20 bills are quite common. Even with a slight amount of wear, it's only going to be worth face value.
$1 bills from 1969 and later are only worth $1 unless they are in uncirculated condition.
The US didn't print any $2 bills dated 1981. Please check again and post a new, separate question.
The banner across its top and the green seals on your bills indicate they're Federal Reserve Notes. The last US silver certificates were $1 bills dated 1957.That said, because $100 bills last longer in circulation, anything dated 1981 or 1985 is still only worth face value in average condition.
US $50 dollar bills have been printed in dozens of series from 1862 to the present. Because series dates stay the same until a new series starts, bills are almost always printed every single year although they carry the date when the series began. The main series dates and bill types are: 1862 United States Note 1863 United States Note 1863-64 Compound Interest Treasury Note 1869 United States Note 1870-75 National Gold Bank Note 1874 United States Note 1875 United States Note 1878 United States Note 1878 Silver Certificate 1880 Silver Certificate 1880 Silver Certificate 1880 United States Note 1880 United States Note 1882 Gold Certificate 1882 Gold Certificate 1891 Treasury Note 1891 Silver Certificate 1891 Silver Certificate 1913 Gold Certificate 1914 Federal Reserve Note 1914 Federal Reserve Note 1918 National Currency/FRBN 1922 Gold Certificate 1928 Gold Certificate 1928 Federal Reserve Note 1928A Federal Reserve Note 1929 National Currency 1929 National Currency 1934-1934D Federal Reserve Note 1950-1950E Federal Reserve Note 1963-1963A Federal Reserve Note 1969-1969C Federal Reserve Note 1974 Federal Reserve Note 1977 Federal Reserve Note 1981-1981A Federal Reserve Note 1985 Federal Reserve Note 1988 Federal Reserve Note 1990 Federal Reserve Note 1993 Federal Reserve Note 1994 Federal Reserve Note 1996 Federal Reserve Note 2001 Federal Reserve Note 2004 Federal Reserve Note 2006 Federal Reserve Note 2009 Federal Reserve Note 2013 Federal Reserve Note
20,000 dollar
Unless it is a "proof" coin (actual silver), it is worth one dollar.
$18
Face value unless it is crisp and unfolded.
Unless it is a "proof" coin (actual silver), it is worth one dollar.
You should have your bill inspected by an expert in error currency to get a specific value. It can potentially be worth $300 to $500. The mistake is called a flipover error and happens when a sheet of bills is accidentally put in the printing press upside down during the step that prints the seals.
The Australian Dollar had not yet been floated in 1981 and was tied to the US Dollar. In 1981 One Australian Dollar was equal to One US Dollar. One Dollar AUD in 1981 had the purchasing power of about $2.85 AUD today. One Dollar AUD in 1981 had the purchasing power of about $2.64 USD today. NOTE - This historical conversion is the result of many calculations and considerations by a purpose designed program for which I can take no credit. The resulting answer should only be regarded as an approximation.
Susan, not "suies" Dollar, not half dollar (you did look at the coin's denomination, didn't you?) Anyway, circulated 1981 coins of any denomination are worth only face value. Go ahead and spend it.