2009 - 1929 = 80
80 minus 4 is 76.
80 minus 12 is 68.
80 minus 12.6 is 67.4
2009 minus 1970 is 39
80 - 45 = 35
-80 - 1 = -81
90 - 80 = 10
140 - 80 = 60
If that is a hyphen the answer is 80. if it is a minus sign the answer is 80i where i is the square root of minus 1
5000.00 minus 20% = 80% of 5000.00 = 5000.00*80/100 = 4000.00
200