a,\(\frac{14}{3}\)>    \(\frac{42}{11}\)

b, 0    <    \(\frac{1}{2}\)+    \(\frac{1}{3}\)+    \(\frac{1}{6}\)

c, 0    <    1    <    \(\frac{1}{4}\)+    \(\frac{5}{6}\)+    \(\frac{11}{12}\)

\(=\dfrac{12}{15}\times\left(\dfrac{26}{11}-\dfrac{9}{11}-\dfrac{6}{11}\right)=\dfrac{12}{15}\times\dfrac{11}{11}=\dfrac{12}{15}=\dfrac{4}{5}\)

= 12/15 x (26/11 - 9/11 - 6/11)

= 12/15 x 11/11

= 12/15

a: x-2/3=1/15+4/9=3/45+20/45=23/45

=>x=23/45+2/3=23/45+30/45=53/45

b: x-4/6=11/12+3/4=11/12+9/12=20/12=5/3

=>x-2/3=5/3

hay x=7/3

Bạn nào giúp mình, mình lại 3 cái!

Mình 3 cái

\(=\dfrac{11}{12}\left(\dfrac{2}{7}+\dfrac{4}{7}+\dfrac{1}{7}\right)=\dfrac{11}{12}\cdot1=\dfrac{11}{12}\)

=11/12

báo cáo nhé?

 the only 

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a,

5xX+6/7=11/12

5 x X=11/12-6/7

5 x X=5/84

X=5/84:5

X=1/84

B,

X :6/5-11/3=3/5

X:6/5= 3/5+11/3

X:6/5=64/15

X=64/15x6/5

X=126/25

NHỚ ****!!!!!!!!!!

a) 5*x+6/7=11/12

5*x=11/12-6/7=77/84-72/84

5x=5/84

x=5/84:5

x=1/84

b) x:6/5-11/3=3/5

x:6/5=3/5+11/3=9/15+55/15

x:6/5=64/15

x=64/15*6/5

x=128/25

Chúc bạn học tốt!^_^

 a,  \(\dfrac{5\times11\times15\times18}{6\times15\times22\times10}\)

= \(\dfrac{5\times11\times15\times6\times3}{6\times15\times11\times2\times2\times5}\)

= \(\dfrac{5\times11\times15\times6}{5\times11\times15\times6}\) \(\times\) \(\dfrac{3}{2\times2}\)

= 1 \(\times\) \(\dfrac{3}{4}\)

= \(\dfrac{3}{4}\)

b, \(\dfrac{7}{12}\) \(\times\) \(\dfrac{3}{5}\) + \(\dfrac{3}{5}\) \(\times\) \(\dfrac{5}{12}\)

= \(\dfrac{3}{5}\) \(\times\) ( \(\dfrac{7}{12}+\dfrac{5}{12}\))

= \(\dfrac{3}{5}\) \(\times\) \(\dfrac{12}{12}\)

= \(\dfrac{3}{5}\) \(\times\) 1 

= \(\dfrac{3}{5}\)

b. \(\dfrac{4.2.3.5.2.6.2.5.3}{4.3.4.5.6.4.5.6}=\dfrac{1}{4}\)

c. \(\dfrac{17.2.101.2005}{17.2.101.2.2005}=\dfrac{1}{2}\)

d. \(\dfrac{2.3.4.2.11.13.17}{3.11.4.4.17.13.2}=\dfrac{1}{2}\)

a)\(\dfrac{4\times6\times10\times12\times15}{4\times12\times5\times24\times30}=\dfrac{2}{2\times2\times2}=\dfrac{2}{8}=\dfrac{1}{4}\)

b)\(\dfrac{34\times101\times2005}{17\times202\times4010}=\dfrac{2}{2\times2}=\dfrac{2}{4}=\dfrac{1}{2}\)

c)\(\dfrac{6\times8\times11\times13\times17}{33\times16\times17\times26}=\dfrac{6}{3\times2\times2}=\dfrac{1}{2}\)