Ta có:

\( \dfrac{7256.4375-725}{3650+4375.7255}\\ =\dfrac{7255.4375+4375-7255}{3650+4375.7255}\\ =\dfrac{7255.4375+\left(4375-725\right)}{3650+4375.7255}\\ =\dfrac{7255.4375+3650}{3650+4375.7255}\\ =1\)

   Vậy giá trị của  \(\dfrac{7256.4375-725}{3650+4375.7255}=1\)

7256.4375-725=(7255+1).4375-725=7255.4375+4375-725=7255.4375+3650

⇒(7256.4375−725)/(3650+4375.7255)=(7255.4375+3650)/(3650+4375.7255)=1

Ta có: \(7256.4375-\dfrac{725}{3650}+4375.7255\)

\(=7256.4375+4375.7255-\dfrac{29}{146}\)

\(=4375\left(7256-7255\right)-\dfrac{29}{146}\)

\(=4375.1-\dfrac{29}{146}\)

\(=\dfrac{638750}{126}-\dfrac{29}{126}\)

\(=\dfrac{638721}{126}=\dfrac{70969}{14}\)

Chúc bn học tốt!!!

\(\frac{7256.4375-725}{3650+4375.7255}\)

\(=\frac{\left(7255+1\right).4375-725}{3650+4375.7255}\)

\(=\frac{7255.4375+4375-725}{3650+4375.7255}\)

\(=\frac{7255.4375+3650}{3650+4375.7255}\)

\(=1\)

\(\frac{7256.4375-725}{3650+4375.7255}=1\)

\(\frac{7256.4375-725}{3650+4375.7255}\) 

\(=\frac{\left(7256-1\right).4375+4375-725}{3650+4375.7255}\)

\(=\frac{7255.4375+3650}{3650+4375.7255}\)

\(=1\)

Hình như là đề bị cái gì đó bn, theo ý nghĩ của mik thì đề phải như thế này:

\(\frac{7256.4375-725}{3650+4375.7255}\)

\(=\frac{\left(7255+1\right)4375-725}{3650+4375.7255}\)

\(=\frac{7255.4375+4375-725}{4375.7255+3650}\)

\(=\frac{4375.7255+3650}{4375.7255+3650}\)

\(=1\)

sorry, mình chép sai, minh k cho ban roi do , thanks bn nhìu nha !

63485624.8

=1

l,i,k,e mình nha bạn thân

\(B=\frac{7256.4375-725}{3650+4375.7255}=\frac{7255.4375+4375-725}{7255.4375+3650}=\frac{7255.4375+3650}{7255.4375+3650}=1\)

\(\frac{7256.4375-725}{3650+4375.7255}=\frac{\left(7255+1\right).4375-725}{3650+4375.7255}\)

\(=\frac{7255.4375+4375-725}{3650+4375.7255}\)

\(=\frac{7255.4375+3650}{3650+4375.7255}\)

\(=1\)

7256 . 4375 - \(\frac{725}{3650}\) + 4375 . 7256

= (7256 . 4375 - 4375 . 7256) + \(\frac{725}{3650}\)

= 0 + \(\frac{725}{3650}\)

= \(\frac{725}{3650}\)

thanks bạn nha

^.^

= 4375 . ( 7256 + 7255 )  - 725/3650

= 4375 .14511 - 725/3650

=63485625 - 725/3650

=53485624,8