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Đọc tiếp
\(\frac{1}{2}\)+\(\left(\frac{16}{21}+\frac{27}{13}\right)\)-\(\left(\frac{14}{13}-\frac{5}{21}\right)\)tính
\(\frac{7}{12}\)-\(\left(\frac{-1}{5}\right)\)-\(\frac{5}{6}\)+\(\frac{2}{3}\)+\(\left(\frac{-1}{5}\right)\)
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NH
15 tháng 6 2019
\(\frac{1}{2}+\left(\frac{16}{21}+\frac{27}{13}\right)-\left(\frac{14}{13}-\frac{5}{21}\right)\)
\(=\frac{1}{2}+\frac{16}{21}+\frac{27}{13}-\frac{14}{13}+\frac{5}{21}\)
\(=\left(\frac{16}{21}+\frac{5}{21}\right)+\left(\frac{27}{13}-\frac{14}{13}\right)+\frac{1}{2}\)
\(=1+1+\frac{1}{2}\)
\(=\frac{5}{2}\)
T
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) \(\frac{49}{5}\)
18 tháng 8 2020
\(\frac{\frac{25}{108}.\frac{1151}{5}+\frac{187}{4}}{\frac{139}{30}:\frac{-41}{21}}\)=\(\frac{\frac{5755}{108}+\frac{187}{4}}{\frac{-973}{410}}\)=\(\frac{\frac{8531}{84}}{\frac{-973}{410}}\)=-241,0180
18 tháng 8 2020
\(\frac{\left(13\frac{1}{4}-2\frac{5}{27}-10\frac{5}{6}\right)\cdot230\frac{1}{5}+46\frac{3}{4}}{\left(1\frac{3}{10}+\frac{10}{3}\right):\left(12\frac{1}{3}-14\frac{2}{7}\right)}\)
\(=\frac{\left(\frac{53}{4}-\frac{59}{27}-\frac{65}{6}\right)\cdot\frac{1151}{5}+\frac{187}{4}}{\frac{139}{30}:\left(-\frac{41}{21}\right)}\)
\(=\frac{\frac{25}{108}\cdot\frac{1151}{5}+\frac{187}{4}}{\frac{139}{30}\cdot\left(-\frac{21}{41}\right)}=\frac{\frac{2701}{27}}{-\frac{973}{410}}\)
Tính nốt vì số dữ quá , lần sau để số ít thôi
\(\frac{1}{2}\)\(+\)\(\left(\frac{16}{21}+\frac{27}{13}\right)\)\(-\)\(\left(\frac{14}{13}-\frac{5}{21}\right)\)
\(=\)\(\frac{1}{2}\)\(+\)\(\frac{16}{21}\)\(+\)\(\frac{27}{13}\)\(-\)\(\frac{14}{13}\)\(+\)\(\frac{5}{21}\)
\(=\)\(\frac{1}{2}\)\(+\)\(\left(\frac{16}{21}+\frac{5}{21}\right)\)\(+\)\(\left(\frac{27}{13}-\frac{14}{13}\right)\)
\(=\)\(\frac{1}{2}\)\(+\)\(\frac{21}{21}\)\(+\)\(\frac{13}{13}\)
\(=\)\(\frac{1}{2}\)\(+\)\(1\)\(+\)\(1\)
\(=\)\(\frac{5}{2}\)
\(\frac{7}{2}\)\(-\)\(\left(\frac{-1}{5}\right)\)\(-\)\(\frac{5}{6}\)\(+\)\(\frac{2}{3}\)\(+\)\(\left(\frac{-1}{5}\right)\)
\(=\)\(\frac{7}{2}\)\(+\)\(\frac{1}{5}\)\(-\)\(\frac{5}{6}\)\(+\)\(\frac{2}{3}\)\(-\)\(\frac{1}{5}\)
\(=\)\(\left(\frac{7}{12}-\frac{5}{6}+\frac{2}{3}\right)\)\(+\)\(\left(\frac{1}{5}-\frac{1}{5}\right)\)
\(=\)\(\frac{7}{2}\)\(-\)\(\frac{5}{6}\)\(+\)\(\frac{2}{3}\)\(+\)\(0\)
\(=\)\(\frac{5}{12}\)\(+\)\(0\)
\(=\)\(\frac{5}{12}\)