\(\frac{69}{77}\)X \(\frac{21}{11}\)
\(\frac{69}{77}\): \(\frac{21}{11}\)
\(\frac{69}{77}\)- \(\frac{21}{11}\)
\(\frac{69}{77}\)+ \(\frac{21}{11}\)
Những câu hỏi liên quan
\(\frac{7+\frac{7}{31}+\frac{7}{69}}{11+\frac{11}{31}+\frac{11}{69}}=?\)
\(-\frac{77}{21}.\frac{8}{9}-\frac{111}{93}\)
\(D=\frac{4}{21}+\frac{4}{77}+\frac{4}{165}+\frac{4}{285}+\frac{4}{437}+\frac{4}{621}\)
\(D=\frac{4}{21}+\frac{4}{77}+\frac{4}{165}+\frac{4}{285}+\frac{4}{437}+\frac{4}{621}\)
\(D=\frac{4}{3.7}+\frac{4}{7.11}+\frac{4}{11.15}+\frac{4}{15.19}+\frac{4}{19.23}+\frac{4}{23.27}\)
\(D=\frac{1}{3}-\frac{1}{7}+\frac{1}{7}-\frac{1}{11}+\frac{1}{11}-\frac{1}{15}+\frac{1}{15}-\frac{1}{19}+\frac{1}{19}-\frac{1}{23}+\frac{1}{23}-\frac{1}{27}\)
\(D=\frac{1}{3}-\frac{1}{27}\)
\(D=\frac{9}{27}-\frac{1}{27}\)
\(D=\frac{8}{27}\)
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\(D=\frac{4}{21}+\frac{4}{77}+\frac{4}{165}+\frac{4}{285}+\frac{4}{437}+\frac{4}{621}\)
\(D=\frac{4}{3.7}+\frac{4}{7.11}+\frac{4}{11.15}+\frac{4}{15.19}+\frac{4}{19.23}+\frac{4}{23.27}\)
\(D=\frac{1}{3}-\frac{1}{7}+\frac{1}{7}-\frac{1}{11}+\frac{1}{11}-\frac{1}{15}+\frac{1}{15}-\frac{1}{19}+\frac{1}{19}-\frac{1}{23}+\frac{1}{23}-\frac{1}{27}\)
\(D=\frac{1}{3}-\frac{1}{27}\)
\(D=\frac{8}{27}\)
_Chúc bạn học tốt_
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D= 4/21 + 4/77 + 4/165 + 4/285 + 4/437 + 4/621
D= 4/3.7 + 4/7.11 + 4/11.15 + 4/15.19 + 4/19.23 + 4/23.27
D= 1/3 - 1/7 + 1/7 -1/11 +1/11 -1/15 +1/15 -1/19 +1/19 -1/23 +1/23 -1/27
D= 1/3 - 1/27
D=9/27 - 1/27
D=8/27
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Xem thêm câu trả lời
Tìm x biết
\(\left(\frac{1}{21}+\frac{1}{77}+\frac{1}{165}+\frac{2}{19.30}+\frac{2}{19.34}\right).x=\frac{3}{276}\)
\(\Leftrightarrow x\cdot\left[\dfrac{1}{4}\left(\dfrac{4}{21}+\dfrac{4}{77}+\dfrac{4}{165}\right)+\dfrac{2}{19\cdot30}+\dfrac{2}{19\cdot34}\right]=\dfrac{3}{276}\)
\(\Leftrightarrow x\cdot\left[\dfrac{1}{4}\left(\dfrac{1}{3}-\dfrac{1}{7}+\dfrac{1}{7}-\dfrac{1}{11}+\dfrac{1}{11}-\dfrac{1}{15}\right)+\dfrac{32}{4845}\right]=\dfrac{3}{276}\)
\(\Leftrightarrow x\cdot\dfrac{71}{969}=\dfrac{3}{276}\)
hay \(x=\dfrac{969}{6532}\)
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Tính A biết :\(A=\frac{1}{21}+\frac{1}{77}+\frac{1}{165}+\frac{1}{285}+\frac{1}{437}\)
A = \(\frac{1}{21}+\frac{1}{77}+\frac{1}{165}+\frac{1}{285}+\frac{1}{437}\)
A = \(\frac{1}{3.7}+\frac{1}{7.11}+\frac{1}{11.15}+\frac{1}{15.19}+\frac{1}{19.23}\)
A = \(\frac{1}{4}.\left(\frac{1}{3}-\frac{1}{7}\right)+\frac{1}{4}.\left(\frac{1}{7}-\frac{1}{11}\right)+\frac{1}{4}.\left(\frac{1}{11}-\frac{1}{15}\right)+\frac{1}{4}.\left(\frac{1}{15}-\frac{1}{19}\right)+\frac{1}{4}.\left(\frac{1}{19}-\frac{1}{23}\right)\)
A = \(\frac{1}{4}.\left(\frac{1}{3}-\frac{1}{7}+\frac{1}{7}-\frac{1}{11}+\frac{1}{11}-\frac{1}{15}+\frac{1}{15}-\frac{1}{19}+\frac{1}{19}-\frac{1}{23}\right)\)
A = \(\frac{1}{4}.\left(\frac{1}{3}-\frac{1}{23}\right)\)
A = \(\frac{1}{4}.\frac{20}{69}\)
A = \(\frac{5}{69}\)
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Kq phép tính \(\left(\frac{-7}{4}:\frac{5}{8}\right).\frac{11}{16}\)là:
(A) \(\frac{-77}{80}\)(B) \(\frac{-77}{20}\)(C) \(\frac{-77}{320}\)(D) \(\frac{-77}{40}\)
Tìm x thuộc N*, biết rằng
\(\frac{1}{21}+\frac{1}{77}+\frac{1}{165}+...+\frac{1}{n^2+4n}=\frac{56}{673}\)
cái này là toán mà bạn, đâu phải vật lý
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\(\frac{x-12}{77}+\frac{x-11}{78}=\frac{x-74}{15}+\frac{x-73}{16}\)
\(\frac{-11}{9}x-49:\frac{-77}{-3}\)= ?
<=> \(\frac{-11}{9}\)X = 49 x \(\frac{3}{77}\)
<=> \(\frac{-11}{9}\)X = \(\frac{147}{77}\)
<=> X = \(\frac{-189}{121}\)
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