lấy ( 6245 - 245 ) + ( 3468 - 462 ) = 6000 + 3002
= 9002
=(6245-245)-(3468+462)
=6000+4000
=10000
~HT~
6245 + 3468 -245 -462= (6245 - 245) + (3468 - 462)
= 6000 + 3006 =9006
(6245-245)+(3468-462) = 6000+2996=9006 bn nhá!
tinh bang cach thuan tien maaa,may bn bi j zaaayyyy