( -5 / 24 + 3/4 – 7/12 ) : ( -5/16) (7/6 – 5/4 ) : 4/9 : -5 /28 -1 /30 – ( 4/5 – 4/15 ) : 4/3 -5/11 : 12/15 – 6 /11 : 12 /25 ( 3/5 – 4/45 ) : -5/18

0 bình luận về “( -5 / 24 + 3/4 – 7/12 ) : ( -5/16) (7/6 – 5/4 ) : 4/9 : -5 /28 -1 /30 – ( 4/5 – 4/15 ) : 4/3 -5/11 : 12/15 – 6 /11 : 12 /25 ( 3/5 – 4/45 ) : -5/18”

1. Đáp án:

    

   Giải thích các bước giải:

    (-5/24+3/4-7/12):(-5/16)=2/15

   (7/6-5/4):4/9:-5/28=1/10

   -1/30-(4/5-4/15):4/3=-13/30

   -5/11:12/15-6/11:12/25=1/11

   (3/5-4/45):-5/18=-22/25

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2. $(\dfrac{-5}{24}+\dfrac{3}{4}-\dfrac{7}{12}):\dfrac{-5}{16}$

   $=(\dfrac{-5}{24}:\dfrac{-5}{16})+(\dfrac{3}{4}:\dfrac{-5}{16})-(\dfrac{7}{12}:\dfrac{-5}{16})$

   $=(\dfrac{-5}{24}\cdot\dfrac{-16}{5})+(\dfrac{3}{4}\cdot\dfrac{-16}{5})-(\dfrac{7}{12}\cdot\dfrac{-16}{5})$

   $=\dfrac{2}{3}+\dfrac{-12}{5}+\dfrac{-28}{15}$

   $=\dfrac{10}{15}+\dfrac{-36}{15}+\dfrac{-28}{15}$

   $=\dfrac{-54}{15}$

   $=\dfrac{-18}{5}$

   $(\dfrac{7}{6}-\dfrac{5}{4}):\dfrac{4}{9}:\dfrac{-5}{28}$

   $=\dfrac{-1}{12}\cdot\dfrac{9}{4}\cdot\dfrac{-28}{5}$

   $=\dfrac{252}{240}$

   $=\dfrac{21}{20}$

   $\dfrac{-1}{30}-(\dfrac{4}{5}-\dfrac{4}{15}):\dfrac{4}{3}$

   $=\dfrac{-1}{30}-\dfrac{8}{15}\cdot\dfrac{3}{4}$

   $=\dfrac{-1}{30}-\dfrac{2}{5}$

   $=\dfrac{-13}{30}$

   $\dfrac{-5}{11}:\dfrac{12}{15}-\dfrac{6}{11}:\dfrac{12}{25}$

   $=\dfrac{-5}{11}\cdot\dfrac{15}{12}-\dfrac{6}{11}\cdot\dfrac{25}{12}$

   $=\dfrac{-25}{44}-\dfrac{25}{22}$

   $=\dfrac{-75}{44}$

   $(\dfrac{3}{5}-\dfrac{4}{45}):\dfrac{-5}{18}$

   $=\dfrac{23}{45}\cdot\dfrac{-18}{5}$

   $=\dfrac{-414}{225}$

   $=\dfrac{-46}{25}$

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