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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!!!
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{7256.4375-725}{3650+4375.7255}=\frac{\left(7255+1\right).4375-725}{3650+4375.7255}\)
\(=\frac{7255.4375+4375-725}{3650+4375.7255}\)
\(=\frac{7255.4375+3650}{3650+4375.7255}\)
\(=1\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(B=\frac{7256.4375-725}{3650+4375.7255}=\frac{7255.4375+4375-725}{7255.4375+3650}=\frac{7255.4375+3650}{7255.4375+3650}=1\)
![](https://rs.olm.vn/images/avt/0.png?1311)
= 4375 . ( 7256 + 7255 ) - 725/3650
= 4375 .14511 - 725/3650
=63485625 - 725/3650
=53485624,8
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\frac{7256.4375-725}{3650+4375.7255}\)
\(=\frac{\left(7255+1\right).4375-725}{3650+4375.7255}\)
\(=\frac{7255.4375+4375-725}{3650+4375.7255}\)
\(=\frac{7255.4375+3650}{3650+4375.7255}\)
\(=1\)
![](https://rs.olm.vn/images/avt/0.png?1311)
(7256.4375 - 725)/(3650 + 4375.7255)
= [(7255 +1).4375 - 725]/(3650 + 4375.7255)
= [(7255.4375 + 1.4375 - 725]/(3650 + 4375.7255)
= (7255.4375 + 3650)/(3650 + 4375.7255) = 1
li ke nha
![](https://rs.olm.vn/images/avt/0.png?1311)
\(=\)\(\dfrac{\left(7256+1\right).4275-725}{3650+4375.7255}\)
\(=\)\(\dfrac{7255.4375+1.4375-725}{3650+4375.7255}\)
\(=\)\(\dfrac{7255.4375+3650}{3650+4375.7255}\)
\(=1\)
\(\dfrac{7256.4375-725}{3650+4375.7255}\)
\(=\dfrac{\left(7255+1\right).4375-725}{3650+4375.7255}\)
\(=\dfrac{7255.4375+1.4375-725}{3650+4375.7255}\)
\(=\dfrac{7255.4375+4375-725}{3650+4375.7255}\)
\(=\dfrac{7255.4375+3650}{3650+4375.7255}\)
\(=1\)
![](https://rs.olm.vn/images/avt/0.png?1311)
a)28.13+74.14
=14.26+74.14
=14.(26+74)
=1400
b) 18.123+9.4567.2+3.5310.6
=18.(123+4567+5310)
=18.10000
=180000
c)S=1
~~~~~~~~~~~ai đi ngang qua nhớ để lại k ~~~~~~~~~~~~~
~~~~~~~~~~~~ Chúc bạn sớm kiếm được nhiều điểm hỏi đáp ~~~~~~~~~~~~~~~~~~~
~~~~~~~~~~~ Và chúc các bạn trả lời câu hỏi này kiếm được nhiều k hơn ~~~~~~~~~~~~
\(\dfrac{7256\cdot4375-725}{3650+4375\cdot7255}\\ =\dfrac{\left(7255+1\right)\cdot4375-725}{7255\cdot4375+3650}\\ =\dfrac{7255\cdot4375+4375-725}{7255\cdot4375+3650}\\ =\dfrac{7255\cdot4375+3650}{7255\cdot4375+3650}\\ =1\)