(7357+2848)+5152= 15357
(54 271 + 39 999) + 10001 =104271
19 999 + (4801 + 15 200)= 40000
18 356 + (1644 + 2135)=22135
(7357+2848)+5152= 15357
(54 271 + 39 999) + 10001 =104271
19 999 + (4801 + 15 200)= 40000
18 356 + (1644 + 2135)=22135