$7,09+2,9 = $  

$55,663-53,46 = $  

$8,23+80,77 = $  

$2,89-2,26 = $  

$71,9+17,8 = $  

$34,7-1,43 = $  

$73,8-23,2 = $  

$85,4+9,13 = $  

$9,8-2,8 = $  

$78,3+47,425+2,08 = $