Question

Bài 7: Thực hiện phép tính:

a) \(\frac{5}{3}+\left(7+\frac{-5}{3}\right)\)                                b) A= -\(\frac{3}{5}\)+ (-\(\frac{2}{5}\)+2)          c)     \(\frac{-17}{13}+\){ \(\frac{25}{101}+\frac{4}{13}\)}

Answer 1

a, \(\frac{5}{3}+\frac{16}{3}=\frac{21}{3}=7\)

b, \(-\frac{3}{5}+\frac{8}{5}\)

= \(\frac{5}{5}=1\)

c, \(-\frac{17}{13}+\frac{729}{1313}=-\frac{76}{101}\)

Answer 2

Answer 3

a) \(\frac{5}{3}\)+(7+\(\frac{-5}{3}\))

= \(\frac{5}{3}\)+\(\frac{37}{6}\)

= \(\frac{47}{6}\)

b) A= \(\frac{-3}{5}\)+(\(\frac{-2}{5}\)+2)

= \(\frac{-3}{5}\)+\(\frac{8}{5}\)

= 1

c) \(\frac{-17}{13}\)+{\(\frac{25}{101}\)+\(\frac{4}{13}\)}

= \(\frac{-17}{13}\)+\(\frac{729}{1313}\)

= \(\frac{-76}{101}\)

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