Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.
\(=\frac{23^{10}\left(1-23\right)}{23^{10}\left(23+21\right)}=\frac{-22}{44}=\frac{-1}{2}\)
\(\frac{23^{10}-23^{11}}{23^{11}+21.23^{10}}\)
\(=\frac{23^{10}.\left(1-23\right)}{23^{10}.\left(23+21\right)}\)
\(=\frac{-22}{44}=\frac{-22}{22.2}=\frac{-1}{2}\)
\(\frac{23^{10}-23^{11}}{23^{11}+21.23^{10}}=\frac{23^{10}\left(1-23\right)}{23^{10}\left(23+21\right)}=-\frac{22}{44}=-\frac{1}{2}\)
b=(11,81+8,19).0,02/9:11,25
b=20.0,02/9:11,25
b=2/45:11,25
b=8/2025
k mk ha
\(B=\left(11,81+8,19\right)\cdot\frac{0,02}{9}:11,25\)
\(B=20\cdot\frac{1}{450}:11,25\)
\(B=\frac{2}{45}:\frac{45}{4}\)
\(B=\frac{2}{45}\cdot\frac{4}{45}\)
\(B=\frac{2\cdot4}{45\cdot45}\)
\(B=\frac{8}{45^2}\)
Vậy\(B=\frac{8}{45^2}\)
~ học tốt ~
= -11/23.-10/13+-11/23.-3/13-(-12/23)
= -11/23.(-10/13+-3/13)-(-12/23)
= -11/23. -1 -(-12/23)
= 11/23- (-12/23)
= -1/23
Ta có: \(A=\dfrac{-11}{23}\cdot\dfrac{-10}{13}+\dfrac{-11}{13}\cdot\dfrac{-3}{23}-\left(-\dfrac{12}{23}\right)\)
\(=\dfrac{11}{13}\left(\dfrac{10}{23}+\dfrac{3}{23}\right)+\dfrac{12}{23}\)
\(=\dfrac{11}{23}\cdot\dfrac{13}{13}+\dfrac{12}{23}\)
\(=\dfrac{-1}{23}\)
5/11+16/22+(-12/4) +(-2/11)
= -2
7/23+(-10/18+(-4/9)+16/23
= 0
bn quy đồng mẫu số nha
duyệt đi
a) Ta có: \(\dfrac{21}{25}\cdot\dfrac{11}{9}\cdot\dfrac{5}{7}\)
\(=\dfrac{21\cdot11\cdot5}{25\cdot9\cdot7}\)
\(=\dfrac{3\cdot7\cdot11\cdot5}{5\cdot5\cdot3\cdot3\cdot7}\)
\(=\dfrac{11}{5\cdot3}=\dfrac{11}{15}\)
