\(=\frac{\frac{5}{11.2}+\frac{3}{13}-\frac{1}{2}}{\frac{4}{13}-\frac{1}{11}+\frac{3}{2}}=\frac{5}{\frac{2}{4}}=\frac{5}{\frac{1}{2}}\)
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Ôn tập toán 6
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tính 2 cách
a)\(4\frac{3}{4}+\left(-0,37\right)+\frac{1}{8}+\left(-1,28\right)+\left(-2,5\right)+3\frac{1}{2}\)
b)\(\frac{\frac{22}{5}+\frac{3}{13}-\frac{1}{2}}{\frac{4}{13}-\frac{2}{11}+\frac{3}{2}}\)
giúp mk nha 
Tính hợp lý:
a) \(4\frac{3}{4}+2,37+\frac{1}{8}+1,28+3,5+3\frac{1}{12}\)
b) \(\frac{\frac{1}{22}+\frac{3}{13}+\frac{1}{2}}{\frac{4}{13}-\frac{2}{11}+\frac{1}{2}}=\frac{11.13.2}{11.13.2}\)
Rút gọn
1. \(\frac{5}{9}.\frac{7}{13}+\frac{5}{9}.\frac{9}{13}-\frac{5}{9}.\frac{3}{13}\)
2. \(\left(\frac{1+\frac{1}{5}+\frac{1}{7}+\frac{1}{11}}{2+\frac{2}{5}+\frac{2}{7}+\frac{2}{17}}:\frac{4-\frac{4}{7}+\frac{4}{9}-\frac{4}{13}}{1-\frac{1}{7}+\frac{1}{9}-\frac{1}{13}}\right):\frac{838383}{808080}\)
Rút gọn
1.left(frac{2}{45}-frac{4}{13}-frac{1}{3}right):left(frac{3}{13}-frac{4}{15}+frac{2}{13}right)
2.frac{0,8:left(frac{4}{5}.1,25right)}{0,64-frac{1}{25}}+frac{left(1,08-frac{2}{15}right):frac{4}{7}}{left(6frac{5}{9}-3frac{1}{4}right)2frac{2}{17}}
3.frac{0,4-frac{2}{9}+frac{2}{11}}{1,4-frac{7}{9}+frac{7}{11}}-frac{frac{1}{3}-0,25+frac{1}{5}}{1frac{1}{6}-0,875+0,7}
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Rút gọn
1.\(\left(\frac{2}{45}-\frac{4}{13}-\frac{1}{3}\right):\left(\frac{3}{13}-\frac{4}{15}+\frac{2}{13}\right)\)
2.\(\frac{0,8:\left(\frac{4}{5}.1,25\right)}{0,64-\frac{1}{25}}+\frac{\left(1,08-\frac{2}{15}\right):\frac{4}{7}}{\left(6\frac{5}{9}-3\frac{1}{4}\right)2\frac{2}{17}}\)
3.\(\frac{0,4-\frac{2}{9}+\frac{2}{11}}{1,4-\frac{7}{9}+\frac{7}{11}}-\frac{\frac{1}{3}-0,25+\frac{1}{5}}{1\frac{1}{6}-0,875+0,7}\)
Giúp mình giải bài toán này nha
\(\frac{\frac{3}{4}-\frac{3}{5}+\frac{3}{7}+\frac{3}{11}}{\frac{13}{4}-\frac{13}{5}+\frac{13}{7}+\frac{13}{11}}\)
tính hợp lí ( nếu có thể )frac{1}{3}.frac{-6}{13}.frac{-9}{10}.frac{-13}{36}frac{-1}{3}.frac{-15}{17}.frac{34}{45}left(1-frac{1}{5}right).left(frac{-3}{10}+frac{1}{5}right)Afrac{1}{3}timesfrac{4}{5}+frac{1}{3}timesfrac{6}{5}+frac{2}{3}11frac{1}{4}-left(2frac{5}{7}+5frac{1}{4}right)
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tính hợp lí ( nếu có thể )
\(\frac{1}{3}.\frac{-6}{13}.\frac{-9}{10}.\frac{-13}{36}\)
\(\frac{-1}{3}.\frac{-15}{17}.\frac{34}{45}\)
\(\left(1-\frac{1}{5}\right).\left(\frac{-3}{10}+\frac{1}{5}\right)\)
\(A=\frac{1}{3}\times\frac{4}{5}+\frac{1}{3}\times\frac{6}{5}+\frac{2}{3}\)
\(11\frac{1}{4}-\left(2\frac{5}{7}+5\frac{1}{4}\right)\)
Tính giá trị của biểu thức, tính nhanh nếu có thể13) frac{2}{3}+frac{2}{15}+frac{2}{35}+frac{2}{63}14) frac{2}{35}+frac{4}{47}+frac{2}{143}+frac{4}{221}+frac{2}{323}+frac{4}{437}+frac{2}{575}15) frac{5}{3}-frac{5}{6}+frac{1}{2}B ___________ frac{9}{10}+frac{13}{30} frac{1}{3}-frac{1}{5}+frac{1}{7} frac{6}{5}+frac{6}{11}-frac{6}{13}16) 162 . ( ____________ + ____________ frac{7}{3}-frac{7}{5}+1 ...
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Tính giá trị của biểu thức, tính nhanh nếu có thể
13) \(\frac{2}{3}+\frac{2}{15}+\frac{2}{35}+\frac{2}{63}\)
14) \(\frac{2}{35}+\frac{4}{47}+\frac{2}{143}+\frac{4}{221}+\frac{2}{323}+\frac{4}{437}+\frac{2}{575}\)
15) \(\frac{5}{3}-\frac{5}{6}+\frac{1}{2}\)
B = ___________
\(\frac{9}{10}+\frac{13}{30}\)
\(\frac{1}{3}-\frac{1}{5}+\frac{1}{7}\) \(\frac{6}{5}+\frac{6}{11}-\frac{6}{13}\)
16) 162 . ( ____________ + ____________
\(\frac{7}{3}-\frac{7}{5}+1\) \(\frac{7}{5}+\frac{7}{11}-\frac{7}{13}\)
thực hiện phép tính( tính nhanh nếu có thể)
a/ \(\frac{-7}{25}.\frac{11}{13}+\frac{-7}{25}.\frac{2}{13}-\frac{18}{25}\)
b/ \(\frac{5}{7}.\frac{1}{3}-\frac{5}{7}.\frac{1}{4}-\frac{5}{7}.\frac{1}{12}\)
c/ \(5\frac{2}{5}.4\frac{2}{7}+5\frac{5}{7}.5\frac{2}{5}\)
d/ \(75\%-1\frac{1}{2}+0,5:\frac{5}{12}-\left(\frac{-1}{2}\right)^2\)
Bài 12 : Thực hiện phép tính một cách hợp lí:
p) \(\frac{-5}{9}+\frac{8}{15}+\frac{-2}{11}+\frac{4}{-9}+\frac{7}{15}\) q) \(\frac{5}{13}+\frac{-5}{17}+\frac{-20}{41}+\frac{8}{13}+\frac{-21}{41}\) r) \(\frac{1}{5}+\frac{-2}{9}+\frac{-7}{9}+\frac{4}{5}+\frac{16}{17}\)