Question

Bài 1.Thực hiện phép tính

A)7/-9-13/9

B)5/24-4/32

C)1/5-1/2+1/3

D)-5/8-1/3+-7/6

Answer 1

a, \(\frac{7}{-9}-\frac{13}{9}=\frac{-7}{9}-\frac{13}{9}=\frac{-7-13}{9}=\frac{-20}{9}\)

b, \(\frac{5}{24}-\frac{4}{32}=\frac{1}{12}\)

c,\(\frac{1}{5}-\frac{1}{2}+\frac{1}{3}=\frac{1}{30}\)

d,\(\frac{-5}{8}-\frac{1}{3}+\frac{-7}{6}=\frac{-17}{8}\)

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Answer 2

a, \(\frac{7}{-9}-\frac{13}{9}=\frac{-7}{9}-\frac{13}{9}=-\frac{20}{9}\)

b, \(\frac{5}{24}-\frac{4}{32}=\frac{5}{24}-\frac{1}{8}=\frac{5}{24}-\frac{3}{24}=\frac{2}{24}=\frac{1}{12}\)

c, \(\frac{1}{5}-\frac{1}{2}+\frac{1}{3}=\frac{6}{30}-\frac{15}{30}+\frac{10}{30}=\frac{1}{30}\)

d, \(\frac{-5}{8}-\frac{1}{3}+\frac{-7}{6}=-\frac{15}{24}-\frac{8}{24}+\frac{-28}{24}=\frac{-51}{24}=-\frac{17}{8}\)