123+456+456.321-256+444= 123+1×456+456.321-256+444 = 123+ 456x(1+321)-256+444 =123+ 456×322-256+444 =123+ (456+444)x322-256 =123+ 900 x322-256 =123+28800-256 =28923-256 =28667 Bình luận
123+456+456.321-256+444= 123+1×456+456.321-256+444
= 123+ 456x(1+321)-256+444
=123+ 456×322-256+444
=123+ (456+444)x322-256
=123+ 900 x322-256
=123+28800-256
=28923-256
=28667