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\(\left(-\dfrac{5}{9}\right)+\dfrac{8}{18}+\left(-\dfrac{12}{11}\right)+\left(-\dfrac{4}{9}\right)+\dfrac{7}{15}\)
\(=\left[\dfrac{4}{9}+\left(-\dfrac{4}{9}\right)\right]+\left(-\dfrac{5}{9}\right)+\left(-\dfrac{12}{11}\right)+\dfrac{7}{15}\)
\(=-\dfrac{224}{495}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
6 phần 13 nhân 8 phần 7 nhân âm 26 phần 3 nhân âm 7 phần 8 = 4
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(\(-\frac{5}{28}+1,75+\frac{8}{35}\)) : (\(-3\frac{9}{20}\))
= \(\frac{9}{5}\) : \(-\frac{39}{10}\)
= \(-\frac{6}{13}\)
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\(\frac{3}{4}+\frac{-1}{3}+\frac{-5}{18}\)
\(=\frac{5}{12}+\frac{-5}{18}\)
\(=\frac{5}{36}\)
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2/x-2/15=-8/15 2/x= -8/15+2/15 => 2/x=-6/15=>2/x=2/-5=>x=-5 Vậy x=-5
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` 5/9 . ( -2/13)+5/9.(-7/13)+(-8/13) = 5/9(-2/13-7/13)-8/13=5/9.(-9/13)-8/13=-5/13-8/13=-13/13=-1 `
\(\dfrac{25}{6}\)
25/6