.....Did you mean the Danish krone, the Swedish krona, the Nowegian krone, the Faroese króna, the Icelandic króna, the Estonian kroon, the Czech koruna, the Yugoslav krone, or the Austro-Hungarian...
When working with numbers the way people do in everyday life 1+1=2. However, there are times and circumstances when the result is different. For example, 1 pile of sand put together with another pile...