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28 tháng 7 2021

\(\frac{1}{2}\)\(+\)\(\left(\frac{16}{21}+\frac{27}{13}\right)\)\(-\)\(\left(\frac{14}{13}-\frac{5}{21}\right)\)

\(=\)\(\frac{1}{2}\)\(+\)\(\frac{16}{21}\)\(+\)\(\frac{27}{13}\)\(-\)\(\frac{14}{13}\)\(+\)\(\frac{5}{21}\)

\(=\)\(\frac{1}{2}\)\(+\)\(\left(\frac{16}{21}+\frac{5}{21}\right)\)\(+\)\(\left(\frac{27}{13}-\frac{14}{13}\right)\)

\(=\)\(\frac{1}{2}\)\(+\)\(\frac{21}{21}\)\(+\)\(\frac{13}{13}\)

\(=\)\(\frac{1}{2}\)\(+\)\(1\)\(+\)\(1\)

\(=\)\(\frac{5}{2}\)

28 tháng 7 2021

\(\frac{7}{2}\)\(-\)\(\left(\frac{-1}{5}\right)\)\(-\)\(\frac{5}{6}\)\(+\)\(\frac{2}{3}\)\(+\)\(\left(\frac{-1}{5}\right)\)

\(=\)\(\frac{7}{2}\)\(+\)\(\frac{1}{5}\)\(-\)\(\frac{5}{6}\)\(+\)\(\frac{2}{3}\)\(-\)\(\frac{1}{5}\)

\(=\)\(\left(\frac{7}{12}-\frac{5}{6}+\frac{2}{3}\right)\)\(+\)\(\left(\frac{1}{5}-\frac{1}{5}\right)\)

\(=\)\(\frac{7}{2}\)\(-\)\(\frac{5}{6}\)\(+\)\(\frac{2}{3}\)\(+\)\(0\)

\(=\)\(\frac{5}{12}\)\(+\)\(0\)

\(=\)\(\frac{5}{12}\)

4 tháng 10 2021

yutyugubhujyikiu

15 tháng 6 2019

\(\frac{1}{2}+\left(\frac{16}{21}+\frac{27}{13}\right)-\left(\frac{14}{13}-\frac{5}{21}\right)\)

\(=\frac{1}{2}+\frac{16}{21}+\frac{27}{13}-\frac{14}{13}+\frac{5}{21}\)

\(=\left(\frac{16}{21}+\frac{5}{21}\right)+\left(\frac{27}{13}-\frac{14}{13}\right)+\frac{1}{2}\)

\(=1+1+\frac{1}{2}\)

\(=\frac{5}{2}\)

15 tháng 6 2019

#)Giải :

\(\frac{1}{2}+\left(\frac{16}{21}+\frac{27}{13}\right)-\left(\frac{14}{13}-\frac{5}{21}\right)\)

\(=\frac{1}{2}+\frac{16}{21}+\frac{27}{13}-\frac{14}{13}+\frac{5}{21}\)

\(=\frac{1}{2}+\left(\frac{16}{21}+\frac{5}{21}\right)+\left(\frac{27}{13}-\frac{14}{13}\right)\)

\(=\frac{1}{2}+1+1\)

\(=2\frac{1}{2}=\frac{5}{2}\)

17 tháng 12 2016

a) \(\frac{17}{9}-\frac{17}{9}:\left(\frac{7}{3}+\frac{1}{2}\right)\)

= \(\frac{17}{9}-\frac{17}{9}:\frac{17}{6}\)

= \(\frac{17}{9}-\frac{2}{3}\)

= \(\frac{11}{9}\)

b) \(\frac{4}{3}.\frac{2}{5}-\frac{3}{4}.\frac{2}{5}\)

= \(\frac{2}{5}.\left(\frac{4}{3}-\frac{3}{4}\right)\)

= \(\frac{2}{5}.\frac{7}{12}\)

= \(\frac{7}{30}\)

Mình lười làm quá, hay mình nói kết quả cho bn thôi nha

c) -6

d) 3

e) 3

g) 12

h) \(\frac{23}{18}\)

i) \(\frac{-69}{20}\)

k) \(\frac{-1}{2}\)

l) \(\frac{49}{5}\)

4 tháng 7 2020

Sửa 41 -> 1/41 nhé!!nhầm xíu :>>

5 tháng 7 2020

thank bạn <3

26 tháng 3 2017

A=\(\frac{-41000}{973}\)

7 tháng 6 2015

                                                    Giải:         

Đặt \(A=13\frac{1}{4}-2\frac{5}{27}-10\frac{5}{6},B=1\frac{3}{7}+\frac{10}{3},C=12\frac{1}{3}-14\frac{2}{7}\)

Ta có:             

\(A=13-2-10+\frac{1}{4}-\frac{5}{27}-\frac{5}{6}=1+\frac{27-20-90}{108}=1-\frac{83}{108}=\frac{25}{108}\)              

\(A.230\frac{1}{5}=\frac{25}{108}.230\frac{1}{25}=\frac{25}{108}.\frac{5751}{25}=\frac{5751}{108}=\frac{213}{4}\)                        

\(A.230\frac{1}{25}+46\frac{3}{4}=\frac{213}{4}+\frac{187}{4}=100\)                     

\(B=1+\frac{3}{7}+3+\frac{1}{3}=4+\frac{3}{7}+\frac{1}{3}=4+\frac{16}{21}=\frac{100}{21}\)                               

\(C=12\frac{1}{3}-14\frac{2}{7}=12-14+\frac{1}{3}-\frac{2}{7}=-2+\frac{7-6}{21}=-\frac{41}{21}\)            

\(B:C=\frac{100}{21}:\left(-\frac{41}{21}\right)=-\frac{100}{41}\)                

\(E=\frac{A.230\frac{1}{25}+46\frac{3}{4}}{B:C}=\frac{100}{-\frac{100}{41}}=-41\)