( 862 + 534 ) + ( 457 - 34 ) - ( 62 - 75 )
= 1396 + 423 + -13
= 1819 + -13
= 1806
(862+534)+(457-34)-(62-75)
= 1396 + 423 - ( 62 ko trừ đc 75 )
( 862 + 534 ) + ( 457 - 34 ) - ( 62 - 75 )
= 1396 + 423 - ( -13 )
= 1819 + 13
= 1832
(862+534)+(457-34)-(62-75)
= 1396 + 423 + 13
= 1832
hok tốt .