Question

Đã trả lời bởi chuyên gia

Answer 1

a)

$\frac{- 23}{27} + (\frac{- 4}{27} - 6) = (\frac{- 23}{27} - \frac{4}{27}) - 6 = \frac{- 27}{27} - 6 = - 1 - 6 = - 7$

b)

$2 \frac{1}{3} + 6 \frac{3}{11} . \frac{7}{26} - 19 \frac{3}{11} . \frac{7}{26} = 2 \frac{1}{3} + (6 \frac{3}{11} - 19 \frac{3}{11}) . \frac{7}{26} = \frac{7}{3} + (6 + \frac{3}{11} - 19 - \frac{3}{11}) . \frac{7}{26} = \frac{7}{3} + (- 13) . \frac{7}{13.2} = \frac{7}{3} - \frac{7}{2} = \frac{14}{6} - \frac{21}{6} = \frac{- 7}{6} c, 75 % + 0, 5 . \frac{10}{3} - 1 \frac{1}{2} \div (\frac{- 1}{2}) = \frac{3}{4} + \frac{5}{10} . \frac{10}{3} + \frac{3}{2} \times \frac{2}{1} = \frac{3}{4} + \frac{5}{3} + 3 = \frac{9}{12} + \frac{20}{12} + \frac{36}{12} = \frac{65}{12}$

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Answer 2

a)

$\frac{- 23}{27} + (\frac{- 4}{27} - 6) = (\frac{- 23}{27} - \frac{4}{27}) - 6 = \frac{- 27}{27} - 6 = - 1 - 6 = - 7$

b)

$2 \frac{1}{3} + 6 \frac{3}{11} . \frac{7}{26} - 19 \frac{3}{11} . \frac{7}{26} = 2 \frac{1}{3} + (6 \frac{3}{11} - 19 \frac{3}{11}) . \frac{7}{26} = \frac{7}{3} + (6 + \frac{3}{11} - 19 - \frac{3}{11}) . \frac{7}{26} = \frac{7}{3} + (- 13) . \frac{7}{13.2} = \frac{7}{3} - \frac{7}{2} = \frac{14}{6} - \frac{21}{6} = \frac{- 7}{6} c, 75 % + 0, 5 . \frac{10}{3} - 1 \frac{1}{2} \div (\frac{- 1}{2}) = \frac{3}{4} + \frac{5}{10} . \frac{10}{3} + \frac{3}{2} \times \frac{2}{1} = \frac{3}{4} + \frac{5}{3} + 3 = \frac{9}{12} + \frac{20}{12} + \frac{36}{12} = \frac{65}{12}$

Answer 3

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