6,38+0,538

(a)  

1,083+5,6+0,56

(a)  

0,564+0,538+6,95

(a)  

24+3,08

(a)  

100,07-73,722

(a)  

9,65-4,32

(a)  

41-6,41-9,5506

(a)  

21,007-8,126

(a)  

15,834-5,45

(a)