A=-7/813+496×(-7/813)+(-7/813)×316
Tính nhanh
C = -7/813 + 496 x (-7/813) + (-7/813) x 316
C=-7/813+496 x (-7/813)+(-7/813) x 316
=-7/813 x (1+496+316)
=-7/813 x 813
=-7
\(C=\frac{-7}{813}+496.\frac{-7}{813}+\frac{-7}{813}.316\)
\(C=\frac{-7}{813}.1+496.\frac{-7}{813}+\frac{-7}{813}.316\)
\(C=\frac{-7}{813}.\left(1+496+316\right)\)
\(C=\frac{-7}{813}.813\)
\(C=\frac{-5691}{813}=-7\)
\(C=\frac{-7}{813}+496\cdot\frac{-7}{813}+\frac{-7}{813}\cdot316\)
\(C=\frac{-7}{813}\cdot1+496\cdot\frac{-7}{813}+\frac{-7}{813}\cdot316\)
\(C=\frac{-7}{813}\cdot\left[1+496+316\right]\)
\(C=\frac{-7}{813}\cdot813=-7\)
\(\frac{-7}{813}+496\cdot\frac{-7}{813}+\frac{-7}{813}\cdot316\)
ai nhanh nhất mình tik!thanks
= \(\frac{-7}{813}.\left(1+496+316\right)=\frac{-7}{813}.813=-7\)
tính nhanh
A = \(\frac{-7}{813}\)+ 496 . (\(\frac{-7}{813}\)) + (\(\frac{-7}{813}\)) . 316
B= \(\frac{-9}{10}\).\(\frac{5}{14}\)+ \(\frac{1}{10}\). (\(\frac{-9}{2}\))+ \(\frac{1}{7}\). (\(\frac{-9}{10}\))
a) \(A=\frac{-7}{813}+496.\left(\frac{-7}{813}\right)+\left(\frac{-7}{813}\right).316\)
\(=\frac{-7}{813}.\left(1+496+316\right)\)
\(=\frac{-7}{813}.813\)
\(=-7\)
b) \(B=\frac{-9}{10}.\frac{5}{14}+\frac{1}{10}.\left(\frac{-9}{2}\right)+\frac{1}{7}.\left(\frac{-9}{10}\right)\)
\(=\frac{-9}{10}.\left(\frac{5}{14}+\frac{1}{2}+\frac{1}{7}\right)\)
\(=\frac{-9}{10}.1\)
\(=\frac{-9}{10}\)
\(A=\left(\frac{1999}{2011}-\frac{2011}{1999}\right)-\left(\frac{-12}{1999}-\frac{12}{2011}\right)\) \(D=\frac{-7}{318}+496.\left(\frac{-7}{813}\right)+\left(\frac{-7}{813}\right).316\)
\(B=\frac{2}{5}\left(\frac{3}{11}+\frac{-2}{5}\right)\)
\(C=\frac{-5}{7}.\frac{4}{13}+\frac{-5}{7}.\frac{9}{13}+\frac{-2}{7}\) \(E=\frac{-9}{10}.\frac{5}{14}+\frac{1}{10}.\left(\frac{-9}{2}\right)+\frac{1}{7}.\left(\frac{-9}{10}\right)\)
Rút gọn biểu thức: a) x + 51 + (-56) + 24; b) (-65) - ( x + 27) + 26 c) 813 - ( 813 - x) + 213 d) 125 - (125 - x) + 22
a, A = 110- (-761)+296+1454-(-813+1077)
b , B = 15.4^12.9^7-4.3^15.8^8/19.2^24.3^14-6.4^12.47^5
c , C = 2^50-2^49-2^48-2^47-...-2^2-2
a) A = 110 - (-761) + 296 + 1454 - (-813 + 1077)
= 110 + 761 + 296 + 1454 - 264
= 871 + 1750 - 264
= 2631 - 264
= 2357
a)-23+176-(2176-23)
b) 125.(-24)+24.225
c) \(\frac{5}{11}\)+\(\frac{26}{22}\)+\(\frac{-12}{4}\)+\(\frac{7}{-11}\)
d)\(\frac{3^2.25+9.75}{500}\)
e) -2015.73+2015.173+ (\(\frac{-2015}{2016}\))0
f)-187(813+2016)-813(2016-187)
a) -23 + 176 - (2176 - 23)
= -23 + 176 - 2176 + 23
= (-23 + 23) + (176 - 2176)
= 0 + (-2000)
= -2000
b) 125 . (-24) + 24 . 225
= (-125) . 24 + 24 . 225
= 24 . (-125 + 225)
= 24 . 100
= 2400
Rút gọn:
A)
45 x 813
275x 83
Help!
\(4^5\cdot81^3\)
\(=\left(2^2\right)^5\cdot\left(3^4\right)^3\)
\(=2^{10}\cdot3^{12}\)
\(27^5\cdot8^3\)
\(=\left(3^3\right)^5\cdot\left(2^3\right)^3\)
\(=3^{15}\cdot2^8\)
này là phân số hay là gì vật bạn, bạn bấm vào kí hiệu \(\Sigma\) góc bên trái để có thể giúp các bạn trả lời đc câu hỏi mình nhé!
45x813=210x312
275x83=315x29
Tính d ) 8 13 : 4