Question

 

Answer 1

hổn biết :V

 

Answer 2

4)

\(=\dfrac{3}{4}+\dfrac{-1}{3}-\dfrac{5}{18}=\dfrac{27}{36}+\dfrac{-12}{36}-\dfrac{10}{36}=\dfrac{5}{36}\)

\(=7^3_5-7^{46}_{35}=\dfrac{-5}{7}\)

Answer 3

4)\(=\dfrac{3}{4}-\dfrac{1}{3}-\dfrac{5}{18}=\dfrac{9}{12}-\dfrac{4}{12}-\dfrac{5}{18}=\dfrac{1}{4}-\dfrac{5}{18}=\dfrac{9}{36}-\dfrac{10}{36}=\dfrac{1}{36}\)

5)\(=7\dfrac{3}{5}-\dfrac{19}{7}-5\dfrac{3}{5}=2\dfrac{3}{5}-\dfrac{19}{7}=\dfrac{13}{5}-\dfrac{19}{7}=-\dfrac{4}{35}\)

Answer 4

4) 0,75 + \(\dfrac{-1}{3}-\dfrac{5}{18}\)

= \(\dfrac{3}{4}+\dfrac{-1}{3}-\dfrac{5}{18}\)

= \(\dfrac{5}{12}-\dfrac{5}{18}\)

= \(\dfrac{5}{36}\)

5) \(7\dfrac{3}{5}-\left(2\dfrac{5}{7}+5\dfrac{3}{5}\right)\)

= \(\dfrac{38}{5}-\left(\dfrac{19}{7}+\dfrac{28}{5}\right)\)

= \(\dfrac{38}{5}-\dfrac{291}{35}\)

= \(-\dfrac{5}{7}\)