Tính nhanh :
a) 28.13+74.14
b) 18.123+9.4567.2+3.5310.6
c) \(S=\frac{7256.4375-725}{3650+4375.7255}\)
Dấu chấm là dấu nhân nha mọi người !
Tính:
\(\frac{7256.4375-725}{3650+4375.7255}\)(Lưu ý: dấu chấm là dấu nhân)
\(\frac{7256.4375-725}{3650+4375.7255}\)
\(=\frac{\left(7255+1\right).4375-725}{3650+4375.7255}\)
\(=\frac{7255.4375+4375-725}{3650+4375.7255}\)
\(=\frac{7255.4375+3650}{3650+4375.7255}\)
\(=1\)
\(\frac{7256.4375-725}{3650+4375.7255}=1\)
\(\frac{7256.4375-725}{3650+4375.7255}\)
\(=\frac{\left(7256-1\right).4375+4375-725}{3650+4375.7255}\)
\(=\frac{7255.4375+3650}{3650+4375.7255}\)
\(=1\)
Thực hiện phép tính:
7256.4375-725/3650+4375.7255.
Làm xong kb vs mình nha. Dấu chấm là dấu nhân nha.
\(\dfrac{7256.4375-725}{3650+4375.7255}\)
tính nhanh
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
Tính nhanh B= \(\frac{7256.4375-725}{3650+4375.7255}\)
\(B=\frac{7256.4375-725}{3650+4375.7255}=\frac{7255.4375+4375-725}{7255.4375+3650}=\frac{7255.4375+3650}{7255.4375+3650}=1\)
\(\frac{7256.4375-725}{3650+4375.7255}\)
\(\frac{7256.4375-725}{3650+4375.7255}=\frac{\left(7255+1\right).4375-725}{3650+4375.7255}\)
\(=\frac{7255.4375+4375-725}{3650+4375.7255}\)
\(=\frac{7255.4375+3650}{3650+4375.7255}\)
\(=1\)
7256.4375-725/3650+4375.7255
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!!!
\(\frac{7256.4375-725}{3650+4375.7255}=?\)
(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
7256.4375-725/3650+4375.7255=
= 4375 . ( 7256 + 7255 ) - 725/3650
= 4375 .14511 - 725/3650
=63485625 - 725/3650
=53485624,8
1, Tính:
\(\dfrac{7256.4375-725}{3650+4375.7255}\)
\(\dfrac{7256\cdot4375-725}{3650+4375\cdot7255}\\ =\dfrac{\left(7255+1\right)\cdot4375-725}{7255\cdot4375+3650}\\ =\dfrac{7255\cdot4375+4375-725}{7255\cdot4375+3650}\\ =\dfrac{7255\cdot4375+3650}{7255\cdot4375+3650}\\ =1\)