Question

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Answer 1

$1 \frac{2}{3} - (- \frac{7}{6}) + (- 0, 8) = \frac{5}{3} + \frac{7}{6} - \frac{4}{5} = \frac{50}{30} + \frac{35}{30} - \frac{24}{30} = \frac{50 + 35 - 24}{30} = \frac{61}{30}$

$\frac{7}{8} - \frac{3}{4} : \frac{- 9}{20} = \frac{7}{8} - \frac{3}{4} \times \frac{- 20}{9} = \frac{7}{8} + \frac{5}{3} = \frac{21}{24} + \frac{40}{24} = \frac{21 + 40}{24} = \frac{61}{24}$

$\frac{8}{9} - [\frac{7}{4} - (\frac{3}{4} - \frac{2}{3})] = \frac{8}{9} - (\frac{7}{4} - \frac{1}{12}) = \frac{8}{9} - \frac{5}{3} = \frac{- 7}{9}$ ...

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Answer 2

$1 \frac{2}{3} - (- \frac{7}{6}) + (- 0, 8) = \frac{5}{3} + \frac{7}{6} - \frac{4}{5} = \frac{50}{30} + \frac{35}{30} - \frac{24}{30} = \frac{50 + 35 - 24}{30} = \frac{61}{30}$

$\frac{7}{8} - \frac{3}{4} : \frac{- 9}{20} = \frac{7}{8} - \frac{3}{4} \times \frac{- 20}{9} = \frac{7}{8} + \frac{5}{3} = \frac{21}{24} + \frac{40}{24} = \frac{21 + 40}{24} = \frac{61}{24}$

$\frac{8}{9} - [\frac{7}{4} - (\frac{3}{4} - \frac{2}{3})] = \frac{8}{9} - (\frac{7}{4} - \frac{1}{12}) = \frac{8}{9} - \frac{5}{3} = \frac{- 7}{9}$ ...

Answer 3

Đây nha bạn:)

$a) 1 \frac{2}{3} - (- \frac{7}{6}) + (- 0, 8)$

$= \frac{5}{3} + \frac{7}{6} + \frac{4}{5}$

$= \frac{50}{30} + \frac{35}{30} - \frac{24}{30} = \frac{50 + 35 - 24}{30} = \frac{61}{30}$

$b) \frac{7}{8} - \frac{3}{4} : \frac{- 9}{20} = \frac{7}{8} - \frac{- 5}{3} = \frac{21}{24} - \frac{- 40}{24} = \frac{21 - (- 40)}{24} = \frac{61}{24}$

$c) \frac{8}{9} - [\frac{7}{4} - (\frac{3}{4} - \frac{2}{3})]$

$= \frac{8}{9} - [\frac{7}{4} - \frac{1}{12}]$

$= \frac{8}{9} - \frac{5}{3}$

$= \frac{8}{9} - \frac{15}{9} = \frac{8 - 15}{9} = \frac{- 7}{9}$

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Answer 4

Đây nha bạn:)

$a) 1 \frac{2}{3} - (- \frac{7}{6}) + (- 0, 8)$

$= \frac{5}{3} + \frac{7}{6} + \frac{4}{5}$

$= \frac{50}{30} + \frac{35}{30} - \frac{24}{30} = \frac{50 + 35 - 24}{30} = \frac{61}{30}$

$b) \frac{7}{8} - \frac{3}{4} : \frac{- 9}{20} = \frac{7}{8} - \frac{- 5}{3} = \frac{21}{24} - \frac{- 40}{24} = \frac{21 - (- 40)}{24} = \frac{61}{24}$

$c) \frac{8}{9} - [\frac{7}{4} - (\frac{3}{4} - \frac{2}{3})]$

$= \frac{8}{9} - [\frac{7}{4} - \frac{1}{12}]$

$= \frac{8}{9} - \frac{5}{3}$

$= \frac{8}{9} - \frac{15}{9} = \frac{8 - 15}{9} = \frac{- 7}{9}$

Answer 5

$a)$ $= \frac{5}{3} + \frac{7}{6} + \frac{- 4}{5} = \frac{100 + 70 - 48}{60} = \frac{- 18}{60} = \frac{- 3}{10}$

b) $= \frac{7}{8} - \frac{3}{4} \times \frac{- 20}{9}$

= $\frac{7}{8} - \frac{- 5}{3}$

= $\frac{61}{24}$

c) $= \frac{8}{9} - \frac{7}{4} + \frac{3}{4} - \frac{2}{3}$

$= (\frac{8}{9} - \frac{2}{3}) - (\frac{7}{4} - \frac{3}{4})$

= $\frac{4}{9} - 1$

= $\frac{4 - 9}{9}$

= $\frac{- 5}{9}$

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Answer 6

$a)$ $= \frac{5}{3} + \frac{7}{6} + \frac{- 4}{5} = \frac{100 + 70 - 48}{60} = \frac{- 18}{60} = \frac{- 3}{10}$

b) $= \frac{7}{8} - \frac{3}{4} \times \frac{- 20}{9}$

= $\frac{7}{8} - \frac{- 5}{3}$

= $\frac{61}{24}$

c) $= \frac{8}{9} - \frac{7}{4} + \frac{3}{4} - \frac{2}{3}$

$= (\frac{8}{9} - \frac{2}{3}) - (\frac{7}{4} - \frac{3}{4})$

= $\frac{4}{9} - 1$

= $\frac{4 - 9}{9}$

= $\frac{- 5}{9}$

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