Question

mọi người giúp mình câu: \(\dfrac{8}{10}+\dfrac{3}{5}x1\dfrac{1}{9}:\dfrac{4}{55}\)

Answer 1

x = nhân nhé

 

Answer 2

\(=\dfrac{4}{5}+\dfrac{2}{3}x.\dfrac{55}{4}=\dfrac{4}{5}+\dfrac{55}{6}x\)

Answer 3

Answer 4

À nếu x là nhân thì:

\(=\dfrac{4}{5}+\dfrac{3}{5}\times\dfrac{10}{9}\times\dfrac{55}{4}=\dfrac{4}{5}+\dfrac{55}{6}=\dfrac{4\times6+55\times5}{30}=\dfrac{299}{30}\)

 

Answer 5

\(\dfrac{8}{10}+\dfrac{3}{5}.1\dfrac{1}{9}:\dfrac{4}{55}\)

= \(\dfrac{8}{10}+\dfrac{3}{5}.\dfrac{10}{9}:\dfrac{4}{55}\)

= \(\dfrac{8}{10}+\dfrac{1.2}{1.3}:\dfrac{4}{55}\)

= \(\dfrac{8}{10}+\dfrac{2}{3}.\dfrac{55}{4}\)

= \(\dfrac{8}{10}+\dfrac{1.55}{3.2}\)

= \(\dfrac{8}{10}+\dfrac{55}{6}\)

= \(\dfrac{24}{50}+\dfrac{275}{50}\)

= \(\dfrac{24+275}{50}\)

= \(\dfrac{299}{50}\)