clari 1 continlenals 999,99= 123,456= 2000,0006= 5.10^2+5.10^1+5.10^-1+5.10^-3= 3.10^3+1.10^1+1.10^-1+3.10^-3=

$999,99=$<br />$123,456=$<br />$2000,0006=$<br />$5.10^{2}+5.10^{1}+5.10^{-1}+5.10^{-3}=$<br />$3.10^{3}+1.10^{1}+1.10^{-1}+3.10^{-3}=$