819+153= (819+1)+52 = 820+52 = 872305+239= (305+5)+34 = 310+34 = 344893+98= (893+7)+91 = 900+91 = 991325+3997= (325+25)+3972 = 350+3972 = 4322256+98= (256+4)+44 = 260+44 = 304999+536= (999+1)+535 = 1000+535 = 15351999+48= (1999+1)+47 = 2000+47 = 2047423+4999= (423+3)+4996 = 426+4996 = 5422
819+153= (819+1)+52 = 820+52 = 872
305+239= (305+5)+34 = 310+34 = 344
893+98= (893+7)+91 = 900+91 = 991
325+3997= (325+25)+3972 = 350+3972 = 4322
256+98= (256+4)+44 = 260+44 = 304
999+536= (999+1)+535 = 1000+535 = 1535
1999+48= (1999+1)+47 = 2000+47 = 2047
423+4999= (423+3)+4996 = 426+4996 = 5422