(-5/11).7/15.(11/-5).(-30) (11/12:33/16).3/5 (-5/9).3/11+(-13/18).3/11 03/10/2021 Bởi Melody (-5/11).7/15.(11/-5).(-30) (11/12:33/16).3/5 (-5/9).3/11+(-13/18).3/11
Đáp án: Giải thích các bước giải: \[\begin{array}{l}\left( { – 5/11} \right).7/15.\left( {11/ – 5} \right).\left( { – 30} \right)\\ = \frac{{ – 5}}{{11}}.\frac{7}{{15}}.\frac{{11}}{{ – 5}}.30\\ = \frac{{17}}{{15}}.30\\ = 34\end{array}\] \[\begin{array}{l}\left( {11/12:33/16} \right).3/5\\ = \left( {\frac{{11}}{{12}}:\frac{{33}}{{16}}} \right).\frac{3}{5}\\ = \frac{{11}}{{12}}.\frac{{16}}{{11}}.\frac{3}{5}\\ = \frac{{11}}{{3.4}}.\frac{{4.4}}{{11}}.\frac{3}{5}\\ = \frac{4}{5}\end{array}\] \[\begin{array}{l}\left( { – 5/9} \right).3/11 + \left( { – 13/18} \right).3/11\\ = \frac{{ – 5}}{9}.\frac{3}{{11}} + \left( {\frac{{ – 13}}{{18}}} \right).\frac{3}{{11}}\\ = \frac{3}{{11}}\left( {\frac{{ – 5}}{9} – \frac{{13}}{{18}}} \right)\\ = \frac{3}{{11}}.\frac{{ – 23}}{{18}}\\ = \frac{{ – 69}}{{198}}\\ = – \frac{{23}}{{66}}\end{array}\] Bình luận
-5/11.7/15.11/-5.-30=(-5/11.11/-5)(7/15.-30)=1.14=14 (11/12:33/16).3/5=11/12.16/33.3/5=11.16.3/12.33.5=4/15 -5/9.3/11+(-13/18).3/11=3/11(-5/9+-13/18)=3/11.-23/18=-23/66 Bình luận
Đáp án:
Giải thích các bước giải:
\[\begin{array}{l}\left( { – 5/11} \right).7/15.\left( {11/ – 5} \right).\left( { – 30} \right)\\ = \frac{{ – 5}}{{11}}.\frac{7}{{15}}.\frac{{11}}{{ – 5}}.30\\ = \frac{{17}}{{15}}.30\\ = 34\end{array}\]
\[\begin{array}{l}\left( {11/12:33/16} \right).3/5\\ = \left( {\frac{{11}}{{12}}:\frac{{33}}{{16}}} \right).\frac{3}{5}\\ = \frac{{11}}{{12}}.\frac{{16}}{{11}}.\frac{3}{5}\\ = \frac{{11}}{{3.4}}.\frac{{4.4}}{{11}}.\frac{3}{5}\\ = \frac{4}{5}\end{array}\]
\[\begin{array}{l}\left( { – 5/9} \right).3/11 + \left( { – 13/18} \right).3/11\\ = \frac{{ – 5}}{9}.\frac{3}{{11}} + \left( {\frac{{ – 13}}{{18}}} \right).\frac{3}{{11}}\\ = \frac{3}{{11}}\left( {\frac{{ – 5}}{9} – \frac{{13}}{{18}}} \right)\\ = \frac{3}{{11}}.\frac{{ – 23}}{{18}}\\ = \frac{{ – 69}}{{198}}\\ = – \frac{{23}}{{66}}\end{array}\]
-5/11.7/15.11/-5.-30=(-5/11.11/-5)(7/15.-30)=1.14=14
(11/12:33/16).3/5=11/12.16/33.3/5=11.16.3/12.33.5=4/15
-5/9.3/11+(-13/18).3/11=3/11(-5/9+-13/18)=3/11.-23/18=-23/66