(a)  

 $32,104+43,831=$  

(a)  

 $212,231+264,759=$  

(a)  

(a)  

 $98,975+435,214=$  

(a)  

 $154,942+342,047=$  

(a)  

 $756,422-342,310=$  

(a)  

 $65,764-43,352=$  

(a)  

 $764,123-89,874=$  

(a)  

 $45,834-12,978=$  

(a)  

 $53,123-26,985=$  

(a)