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8 tháng 7 2015

Mình làm thử, không biết có sai không, nếu sai thì cho mình đáp án rút kinh nghiệm nhé:

     \(\left(13\frac{9}{11}:\frac{38}{49}-5\frac{2}{11}:\frac{38}{49}\right):\left(\frac{49}{38}.\frac{5}{11}\right)\)   

\(=\left(\frac{152}{11}:\frac{38}{49}-\frac{57}{11}:\frac{38}{49}\right):\left(\frac{49}{38}.\frac{5}{11}\right)\)

\(=\left(\frac{196}{11}-\frac{147}{22}\right):\frac{245}{418}\)

\(=\frac{245}{22}:\frac{245}{418}=19\)

 

 

27 tháng 6 2015

=\(\left(13\frac{9}{11}.\frac{49}{38}-5\frac{2}{11}.\frac{49}{38}\right).\left(\frac{38}{49}.\frac{11}{5}\right)\)

\(\left(13\frac{9}{11}-5\frac{2}{11}\right).\frac{49}{38}.\frac{38}{49}.\frac{11}{5}\) = \(\left(13+\frac{9}{11}-5-\frac{2}{11}\right).\frac{11}{5}\)

=  \(\left(8+\frac{7}{11}\right).\frac{11}{5}\)\(\frac{95}{11}.\frac{11}{5}=19\)

27 tháng 6 2015

         \(\left(13\frac{9}{11}:\frac{38}{49}-5\frac{2}{11}:\frac{38}{49}\right):\left(\frac{49}{38}.\frac{5}{11}\right)\)     

    \(=\left(\frac{152}{11}:\frac{38}{49}-\frac{57}{11}:\frac{38}{49}\right):\left(\frac{49}{38}.\frac{5}{11}\right)\) 

    \(=\left(\frac{196}{11}-\frac{147}{22}\right):\frac{245}{418}=\frac{245}{22}:\frac{245}{418}=19\)

15 tháng 8 2019

\(A=49\frac{8}{23}-\left(5\frac{7}{32}+14\frac{8}{23}\right)\)

\(A=49\frac{8}{23}-5\frac{7}{32}+14\frac{8}{23}\)

\(A= \left(49\frac{8}{23}-14\frac{8}{23}\right)-5\frac{7}{32}\)

\(A=\left[\left(49-14\right)-\left(\frac{8}{23}-\frac{8}{23}\right)\right]-5\frac{7}{32}\)

\(A=\left[35-0\right]-5\frac{7}{32}\)

\(A=35-5\frac{7}{32}\)

\(A=\frac{953}{32}\)

\(B=71\frac{38}{45}-\left(43\frac{38}{45}-1\frac{17}{57}\right)\)

\(B=71\frac{38}{45}-\frac{36377}{855}\)

\(B=\frac{1670}{57}\)

\(C=\left(19\frac{5}{8}:\frac{7}{12}-13\frac{1}{4}:\frac{7}{12}\right):\frac{4}{5}\)

\(C=\left[\left(19\frac{5}{8}-13\frac{1}{4}\right):\frac{7}{12}\right]:\frac{4}{5}\)

\(C=\left[\frac{51}{8}:\frac{7}{12}\right]:\frac{4}{5}\)

\(C=\frac{153}{14}:\frac{4}{5}\)

\(C=\frac{765}{56}\)

\(D=\left[\left(\frac{10}{15}-\frac{2}{3}\right):\frac{1}{7}\right]\cdot0,15-\frac{1}{4}\)

\(D=\left[0:\frac{1}{7}\right]\cdot\frac{3}{20}-\frac{1}{4}\)

\(D=0\cdot\frac{3}{20}-\frac{1}{4}\)

\(D=0-\frac{1}{4}\)

\(D=-\frac{1}{4}\)

\(E=\frac{13}{30}+\frac{28}{45}\cdot2\frac{1}{2}-\left[\left(\frac{1}{2}+\frac{1}{3}\right):\frac{53}{90}\right]:\frac{50}{53}\)

\(E=\frac{13}{30}+\frac{28}{45}\cdot\frac{5}{2}-\left[\frac{5}{6}:\frac{53}{90}\right]:\frac{50}{53}\)

\(E=\frac{13}{30}+\frac{28}{45}\cdot\frac{5}{2}-\frac{75}{53}:\frac{50}{53}\)

\(E=\frac{13}{30}+\frac{14}{9}-\frac{3}{2}\)

\(\)\(E=\frac{22}{45}\)

CHUC BAN HOC TOT >.<

7 tháng 7 2018

\(\frac{38}{11}+\left(\frac{13}{16}+\frac{6}{11}\right)\)

\(=\left(\frac{38}{11}+\frac{6}{11}\right)+\frac{13}{16}\)

\(=4+\frac{13}{16}\)

\(=\frac{77}{16}\)

---------HOK TỐT---------

7 tháng 7 2018

Trả lời :

\(\frac{38}{11}+\left(\frac{13}{16}+\frac{6}{11}\right)\)

\(=\frac{38}{11}+\frac{13}{16}+\frac{6}{11}\)

\(=\left(\frac{38}{11}+\frac{6}{11}\right)+\frac{13}{16}\)

\(=4+\frac{13}{16}\)

\(4\frac{13}{16}\)

5 tháng 7 2016

\(\frac{38}{11}+\left(\frac{13}{16}+\frac{6}{11}\right)\)

\(=\left(\frac{38}{11}+\frac{6}{11}\right)+\frac{13}{16}\)

\(=\frac{44}{11}+\frac{13}{16}\)

\(=4+\frac{13}{16}\)

\(=\frac{64}{16}+\frac{13}{16}\)

\(=\frac{77}{16}\)

5 tháng 7 2016

Ta có: \(\frac{38}{11}+\left(\frac{13}{16}+\frac{6}{11}\right)\)

 \(=\left(\frac{38}{11}+\frac{6}{11}\right)+\frac{13}{16}\)

  \(=4+\frac{13}{16}=\frac{77}{16}\)

11 tháng 11 2019

\(3\frac{1}{2}.\frac{4}{49}-\left[2,\left(4\right).2\frac{5}{11}\right]:\left(-\frac{42}{5}\right)\)

\(=\frac{7}{2}.\frac{4}{49}-\left[\frac{22}{9}.\frac{27}{11}\right]:\left(-\frac{42}{5}\right)\)

\(=\frac{7}{2}.\frac{4}{49}-6:\left(-\frac{42}{5}\right)\)

\(=\frac{2}{7}-\left(-\frac{5}{7}\right)\)

\(=\frac{2}{7}+\frac{5}{7}\)

\(=1.\)

Chúc bạn học tốt!

11 tháng 11 2019

\(0,4\left(3\right)+0,\left(6\right)2.2\frac{1}{2}-\frac{\frac{1}{2}+\frac{1}{3}}{0,\left(5\right)8}:\frac{50}{53}\)

Giải hộ mik câu này nx nha

23 tháng 9 2016

bai de the ma cung hoi