\(\frac{13}{21}-5\frac{13}{21}\)
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Tính:
\(\frac{1}{2}+\left(\frac{16}{21}+\frac{27}{13}\right)-\left(\frac{14}{13}-\frac{5}{21}\right)\)
\(\frac{1}{2}+\left(\frac{16}{21}+\frac{27}{13}\right)-\left(\frac{14}{13}-\frac{5}{21}\right)\)
\(=\frac{1}{2}+\frac{16}{21}+\frac{27}{13}-\frac{14}{13}+\frac{5}{21}\)
\(=\left(\frac{16}{21}+\frac{5}{21}\right)+\left(\frac{27}{13}-\frac{14}{13}\right)+\frac{1}{2}\)
\(=1+1+\frac{1}{2}\)
\(=\frac{5}{2}\)
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#)Giải :
\(\frac{1}{2}+\left(\frac{16}{21}+\frac{27}{13}\right)-\left(\frac{14}{13}-\frac{5}{21}\right)\)
\(=\frac{1}{2}+\frac{16}{21}+\frac{27}{13}-\frac{14}{13}+\frac{5}{21}\)
\(=\frac{1}{2}+\left(\frac{16}{21}+\frac{5}{21}\right)+\left(\frac{27}{13}-\frac{14}{13}\right)\)
\(=\frac{1}{2}+1+1\)
\(=2\frac{1}{2}=\frac{5}{2}\)
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\(\frac{1}{2}+\left(\frac{16}{21}+\frac{27}{13}\right)-\left(\frac{14}{13}-\frac{5}{21}\right)\)
\(=\frac{1}{2}+\frac{16}{21}+\frac{27}{13}-\frac{14}{13}+\frac{5}{21}\)
\(=\frac{1}{2}+\left(\frac{16}{21}+\frac{5}{21}\right)+\left(\frac{27}{13}-\frac{14}{13}\right)\)
\(=\frac{1}{2}+1+1\)
\(=1+2+2\)
\(=5\)
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Xem thêm câu trả lời
\(\frac{1}{2}+\left(\frac{16}{21}+\frac{17}{13}\right)-\left(\frac{14}{13}-\frac{5}{21}\right)=?\)
Tính
\(\frac{5}{13}+-\frac{5}{17}+-\frac{20}{41}+\frac{8}{13}+-\frac{21}{41}\)
\(\frac{5}{13}+-\frac{5}{17}+-\frac{20}{41}+\frac{8}{13}+-\frac{21}{41}\)
\(=\left(\frac{5}{13}+\frac{8}{13}\right)+\left(-\frac{20}{41}+-\frac{21}{41}\right)+-\frac{5}{17}\)
\(=1+\left(-1\right)+-\frac{5}{17}\)
\(=0+-\frac{5}{17}\)\(=-\frac{5}{17}\)
Ủng hộ tk Đúng nhé mọi người !!! ^^
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\(\left(1\frac{75}{100}+\frac{18}{21}+\frac{19}{32}+\frac{1}{4}+\frac{3}{21}+\frac{13}{21}\right):5\)
\(21\frac{13}{15}.\frac{-11}{5}+13\frac{2}{15}:\frac{-5}{11}+\left(\frac{3}{4}\right)^2\)
=\(21\frac{13}{15}.\frac{-11}{5}+13\frac{2}{15}.\frac{-11}{5}+\frac{9}{16}\)
=\(\left(21\frac{13}{15}+13\frac{2}{15}\right).\frac{-11}{5}+\frac{9}{16}\)
= \(35.\frac{-11}{5}+\frac{9}{16}\)
= \(-77+\frac{9}{16}\)
= \(\frac{1223}{16}\)
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\(21\frac{13}{15}.\frac{-11}{5}+13\frac{2}{15}:\frac{-5}{11}+\left(\frac{3}{4}\right)^2\)
\(=21\frac{13}{15}.\frac{-11}{5}+13\frac{2}{15}.\frac{-11}{5}\)\(+\frac{9}{16}\)
=\(\left(21\frac{13}{15}+13\frac{2}{15}\right).\frac{-11}{5}+\frac{9}{16}\)
\(=35.\frac{-11}{5}+\frac{9}{16}\)
\(=-77+\frac{9}{16}\)
\(=-77+1-\frac{7}{16}\)
\(=-77-\frac{7}{16}=-77\frac{7}{16}\)
Ta có:
\(21\frac{13}{15}.\frac{-11}{5}+13\frac{2}{15}:\frac{-5}{11}+\left(\frac{3}{4}\right)^2\)
\(=\frac{328}{15}.\frac{-11}{5}+\frac{197}{15}:\frac{-5}{11}+\frac{9}{16}\)
\(=\frac{328}{15}.\frac{-11}{5}+\frac{197}{15}.\frac{-11}{5}+\frac{9}{16}\)
\(=\frac{-5}{11}\left(\frac{328}{15}+\frac{197}{15}\right)+\frac{9}{16}\)
\(=\frac{-5}{11}.35+\frac{9}{16}\)
\(=\frac{-175}{11}+\frac{9}{16}\)
\(=\frac{-2701}{176}\)
Vậy........
Bạn Online Vietnamese sai rùi nhé
Tim x :\(\frac{-3}{5}.51\frac{11}{13}+\frac{3}{5}.21\frac{11}{13}\)
can tro giup gap
A=\(\frac{5}{13}+\frac{-5}{7}+\frac{-20}{41}+\frac{8}{13}+\frac{-21}{41}\)
\(A=\frac{5}{13}+\frac{-5}{7}+\frac{-20}{41}+\frac{8}{13}+\frac{-21}{41}\)
\(A=\left(\frac{5}{13}+\frac{8}{13}\right)+\left(-\frac{20}{41}+\frac{-21}{41}\right)+\left(-\frac{5}{7}\right)\)
\(A=1+\left(-1\right)-\frac{5}{7}\)
\(A=0+\left(-\frac{5}{7}\right)\)
\(A=-\frac{5}{7}\)
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A=5/13-5/7-20/41+8/13-21/41
A=5/13+8/13-20/41-21/41-5/7
A=13/13-41/41-5/7
A=1-1-5/7
A=0-5/7
A=-5/7
Vậy A=-5/7
tk nha bn
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Xem thêm câu trả lời
a.\(\frac{27}{12}+\frac{5}{21}-\frac{4}{23}+\frac{6}{21}+\frac{1}{2}\)
b.\(\frac{1}{2}+(-\frac{1}{7})-(\frac{-1}{13})+\frac{-1}{3}-(\frac{-2}{5})+\frac{-11}{21}+\frac{1}{10}\)