Cálculos Matemáticos

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2 015 x 2 015 x 
 1 654 = 8 345 = 
3 332 810 + 16 815 175 
 2014 7984 
 
 8345 complement 9 of 1 654 
 
Final result 
2015 -1 = 2014 
 7985 (complemente 9 of 2014) 
 
2015 x 9999 = 2015 x (10 000 -1) 
 = 2015 0000 – 2015 
 = 2014 0000 + 9999 – 2015 + 1 
 = 2014 0000 + 9999 – 2014 
 = 2014 0000 + 7985