\(\frac{7256.4375-725}{3650+4375.7255}\)
\(\frac{3^{10}.11+3^{10}.5;}{3^9.2^4}\)\(\frac{2^{10}.13+2^{10}.65}{2^8.104}\)
\(\left(125^3.7^5-175^5.5\right):2001^{2002}\)
\(\frac{7256.4375-725}{3650+4375.7255}\)
\(\frac{7256.4375-725}{3650+4375.7255}=\frac{\left(7255+1\right).4375-725}{3650+4375.7255}\)
\(=\frac{7255.4375+4375-725}{3650+4375.7255}\)
\(=\frac{7255.4375+3650}{3650+4375.7255}\)
\(=1\)
\(\frac{7256.4375-725}{3650+4375.7255}=?\)
(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
Tính nhanh B= \(\frac{7256.4375-725}{3650+4375.7255}\)
\(B=\frac{7256.4375-725}{3650+4375.7255}=\frac{7255.4375+4375-725}{7255.4375+3650}=\frac{7255.4375+3650}{7255.4375+3650}=1\)
Tính:
\(\frac{7256.4375-725}{3650+4375.7255}\)(Lưu ý: dấu chấm là dấu nhân)
\(\frac{7256.4375-725}{3650+4375.7255}\)
\(=\frac{\left(7255+1\right).4375-725}{3650+4375.7255}\)
\(=\frac{7255.4375+4375-725}{3650+4375.7255}\)
\(=\frac{7255.4375+3650}{3650+4375.7255}\)
\(=1\)
\(\frac{7256.4375-725}{3650+4375.7255}=1\)
\(\frac{7256.4375-725}{3650+4375.7255}\)
\(=\frac{\left(7256-1\right).4375+4375-725}{3650+4375.7255}\)
\(=\frac{7255.4375+3650}{3650+4375.7255}\)
\(=1\)
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!!!
\(\dfrac{7256.4375-725}{3650+4375.7255}\)
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
có thể viết rõ hơn ko mình ko hiểu
a)\(\left(5.4^{11}-3.16^5\right):4^{10}\)
b)\(\dfrac{7256.4375-725}{3650+4375.7255}\)
c)100+98+96+...+4+2-97-95-...-3-1
giúp mình nhé
\(100 + 98 + 96 + ... + 2 - 97 - 95 - ... -1\)
\(= 100 + (98 - 97) + (96-95) +... + (2 - 1)\)
\(= 100 + 1 + 1 + 1 + ... +1\)
\(=100+1\cdot49\)
\(= 100 + 49 \)
\(= 149\)
tính nhanh
\(\frac{\left(456.11+912\right).37}{13.74}\)
\(\frac{864.48-432.96}{864.48.432}\)
\(\frac{16.17-5}{16.16+11}\)
\(\frac{45.16-17}{28+45.15}\)
\(\frac{7256.4375-725}{3650+4375.7255}\)
\(\frac{\left(456.11+912\right).37}{13.74}\)
\(=\frac{\left(456.11+456.2\right).37}{13.37.2}\)
\(=\frac{[456.\left(11+2\right).37}{13.37.2}\)
\(=\frac{456.13}{13.2}\)
\(=\frac{456}{2}=228\)