Question

giúp nhé mik cần gấp

Answer 1

a) \(-3,2.\dfrac{15}{64}+\left(98-2\dfrac{4}{15}\right):3\dfrac{2}{3}\)

= \(\dfrac{-3}{4}\)+ \(\dfrac{1436}{15}\) : \(\dfrac{11}{3}\)

= \(\dfrac{-3}{4}\)+ \(\dfrac{1436}{55}\)

= \(\dfrac{5579}{220}\)

b) \(0,02.\dfrac{-25}{2}+\dfrac{3}{8}+\left(-2\dfrac{9}{20}\right).\dfrac{2}{7}\)

= \(\dfrac{-1}{4}\)+ \(\dfrac{3}{8}\)+ \(\left(\dfrac{-49}{20}\right)\). \(\dfrac{2}{7}\)

= \(\dfrac{1}{8}\) + \(\dfrac{-7}{10}\)

= \(\dfrac{-23}{40}\)

c) \(34\%:\dfrac{51}{16}-3\dfrac{7}{9}.6,5-\left(0,4\right)^2\)

= \(\dfrac{17}{50}\): \(\dfrac{51}{16}\) - \(\dfrac{34}{9}\). 6,5 - \(\dfrac{4}{25}\)

= \(\dfrac{8}{75}\) - \(\dfrac{221}{9}\) - \(\dfrac{4}{25}\)

= \(\dfrac{-5501}{225}\) - \(\dfrac{4}{25}\)

= \(\dfrac{-5537}{225}\)

d) \(3\dfrac{1}{7}\left\{\left[2-1\dfrac{3}{5}:\left(\dfrac{4}{3}-1,6\right)\right]-25\%\right\}\)

= \(\dfrac{22}{7}\)\(\left\{\left[2-\dfrac{8}{5}:\dfrac{-4}{15}\right]-\dfrac{1}{4}\right\}\)

= \(\dfrac{22}{7}\)\(\left\{\left[2-\left(-6\right)\right]-\dfrac{1}{4}\right\}\)

= \(\dfrac{22}{7}\left\{8-\dfrac{1}{4}\right\}\)

= \(\dfrac{22}{7}\). \(\dfrac{31}{4}\)

= \(\dfrac{341}{14}\)

Nhớ tick nha