Question

4/5 : ( 4/5 . -5/4) : ( 16/25 - 1/5 )

11/12 : ( 7/9 + -1/3 ) - ( 2/3 - 5/15 )

-2/5 . ( 9/8 + 16/32 -3/4 ) - 9/10

( 4/3 + 8/3 ) . ( 7/4 - 6/4 ) : ( 6/5 + 12/5 + 1/5 )

 

Answer 1

cách giải bài này như nào: 5/20+1/4+6/24+8/32=bao nhiêu

Answer 2

    \(\dfrac{4}{5}\) : (\(\dfrac{4}{5}\) .- \(\dfrac{5}{4}\)) : (\(\dfrac{16}{25}\) - \(\dfrac{1}{5}\))

=  \(\dfrac{4}{5}\) : (-1) : (\(\dfrac{16}{25}\) - \(\dfrac{5}{25}\))

= -\(\dfrac{4}{5}\)  : \(\dfrac{11}{25}\)

= - \(\dfrac{4}{5}\) x \(\dfrac{25}{11}\)

=  - \(\dfrac{20}{11}\)

Answer 3

    \(\dfrac{11}{12}\) : (\(\dfrac{7}{9}\) + \(\dfrac{-1}{3}\)) - (\(\dfrac{2}{3}\) - \(\dfrac{5}{15}\))

= \(\dfrac{11}{12}\) : (\(\dfrac{7}{9}\) - \(\dfrac{3}{9}\)) - (\(\dfrac{2}{3}\) - \(\dfrac{1}{3}\))

= \(\dfrac{11}{12}\) : \(\dfrac{4}{9}\) - \(\dfrac{1}{3}\)

= \(\dfrac{11}{12}\) x \(\dfrac{9}{4}\) - \(\dfrac{1}{3}\)

= \(\dfrac{99}{48}\) - \(\dfrac{1}{3}\)

= \(\dfrac{99}{48}\) - \(\dfrac{16}{48}\)

= \(\dfrac{83}{48}\)  

Answer 4

- \(\dfrac{2}{5}\).(\(\dfrac{9}{8}\) + \(\dfrac{16}{32}\) - \(\dfrac{3}{4}\)) - \(\dfrac{9}{10}\)

= - \(\dfrac{2}{5}\).(\(\dfrac{9}{8}\) + \(\dfrac{4}{8}\) - \(\dfrac{3}{4}\)) - \(\dfrac{9}{10}\)

=  - \(\dfrac{2}{5}\).(\(\dfrac{13}{8}\) - \(\dfrac{6}{8}\)) - \(\dfrac{9}{10}\)

= - \(\dfrac{2}{5}\).\(\dfrac{7}{8}\) - \(\dfrac{9}{10}\)

=  \(-\dfrac{7}{20}\) - \(\dfrac{18}{20}\)

= \(\dfrac{-25}{20}\)

= - \(\dfrac{5}{4}\)

 

Answer 5

(\(\dfrac{4}{3}\) + \(\dfrac{8}{3}\)).(\(\dfrac{7}{4}\) - \(\dfrac{6}{4}\)) : (\(\dfrac{6}{5}\) + \(\dfrac{12}{5}\) + \(\dfrac{1}{5}\))

= \(\dfrac{12}{3}\).\(\dfrac{1}{4}\): (\(\dfrac{18}{5}\) + \(\dfrac{1}{5}\))

= 1 : \(\dfrac{19}{5}\)

= 1 x \(\dfrac{19}{5}\)

= \(\dfrac{5}{19}\)

Answer 6

@ Nhi

\(\dfrac{5}{20}\) + \(\dfrac{1}{4}\) + \(\dfrac{6}{24}\) + \(\dfrac{8}{32}\)

= \(\dfrac{1}{4}\) + \(\dfrac{1}{4}\) + \(\dfrac{1}{4}\) + \(\dfrac{1}{4}\)

= \(\dfrac{1}{4}\) x 4

= 1