Tính tổng: M= 1252/417 . 1/762 - 1/139 . 3809/762 - 2/417 . 2/762 + 5/139
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Tính nhanh:
M= 1252/417 . 1/762 - 1/139 . 3809/762 - 2/417 . 2/762 + 5/139
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Tính nhanh:(3+1/417)*1/762-1/139*(4+761/762)-4/(417*762)+5/139
\(\frac{3+1}{417}\) hay \(3+\frac{1}{417}\) z bn?
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tính tổng :
M=\(3\frac{1}{417}\cdot\frac{1}{762}-\frac{1}{139}\cdot4\frac{761}{762}-\frac{4}{417\cdot762}+\frac{5}{139}\)
Tính tổng M=\(3\dfrac{1}{417}\times\dfrac{1}{762}-\dfrac{1}{139}\times4\dfrac{761}{762}-\dfrac{4}{417\times762}+\dfrac{5}{139}\)
\(M=\left(\dfrac{1252}{417.762}-\dfrac{4}{417.762}\right)-\left(\dfrac{1}{139}+\dfrac{5}{139}\right).\dfrac{3809}{762}\)
\(M=\left(\dfrac{1252-4}{317754}\right)-\dfrac{6}{139}.\dfrac{3809}{762}\)
\(M=\left(\dfrac{1248}{317754}\right)-\dfrac{22854}{105918}\)
\(M=\dfrac{208}{52959}-\dfrac{3809}{17653}\)
\(M=\dfrac{3671824}{934885227}-\dfrac{201720831}{934885227}\)
\(M=\dfrac{-198049007}{934885227}\)
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bài 1:tính tổng M=\(3\frac{1}{417}\cdot\frac{1}{762}-\frac{1}{139}\cdot4\frac{761}{76}-\frac{4}{417-762}+\frac{5}{139}\)
ai giải nhanh nhất mình tick
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(3+1/417).1/762-1/139.(4+761/762)-4/417.762+5/139
\(3\frac{1}{417}\cdot\frac{1}{762}-\frac{1}{139}\cdot4\frac{761}{762}-\frac{4}{417\cdot762}+\frac{5}{139}\)
\(3\frac{1}{417}\times\frac{1}{762}-\frac{1}{139}\times4\frac{761}{762}-\frac{4}{417\times762}+\frac{5}{139}=?\)
= \(\frac{3}{762}+\frac{1}{417.762}-\frac{1}{139}.\left(4+\frac{761}{762}\right)-\frac{4}{417.762}+\frac{5}{139}\)
= \(\frac{3}{762}+\left(\frac{1}{417.762}-\frac{4}{417.762}\right)-\frac{1}{139}.\left(4+1-\frac{1}{762}\right)+\frac{5}{139}\)
= \(\frac{3}{762}+\frac{-3}{417.762}-\frac{5}{139}+\frac{1}{762.139}+\frac{5}{139}\)
= \(\frac{3}{762}+\left(\frac{-1}{139.762}+\frac{1}{762.139}\right)+\left(-\frac{5}{139}+\frac{5}{139}\right)=\frac{3}{762}=\frac{1}{254}\)
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Tính :\(3\frac{1}{417}.\frac{1}{762}-\frac{1}{139}.4\frac{761}{762}-\frac{4}{417.762}+\frac{5}{139}\)