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C1: 3/22 x 3/11 x 22
= 9 x 22/22 x 11 = 198/242=9/11
C2: 3/22 x 3/11 x 22
= 3 x 3 x 22/22 x 11 x 1 = 3 x 3/ 11 x 1 = 9/11
3/22 x 3/11 x 22=
c1:\(\frac{3\times3\times22}{22\times11}=\frac{9}{11}\) c2:\(\frac{9}{242}\times22=\frac{9}{11}\)
( 1/2 + 1/3 ) x 2/5=
c1:\(\frac{5}{6}\times\frac{2}{5}=\frac{1}{3}\) c2:\(\frac{1}{2}\times\frac{2}{5}+\frac{1}{3}\times\frac{2}{5}=\frac{1}{5}+\frac{2}{15}=\frac{1}{3}\)
\(\frac{3}{5}\times\frac{7}{21}+\frac{7}{21}\times\frac{2}{5}=\frac{7}{21}\times\left(\frac{3}{5}+\frac{2}{5}\right)=\frac{1}{3}\times\left(\frac{3}{5}+\frac{2}{5}\right)=\frac{1}{3}\times1=\frac{1}{3}\)
Học tốt !
\(\frac{3}{5}\cdot\frac{7}{21}+\frac{7}{21}+\frac{2}{5}\)
\(=\frac{7}{21}\cdot(\frac{3}{5}+\frac{2}{5})\)
\(=\frac{7}{21}\cdot1=\frac{7}{21}=\frac{1}{3}\)
\(x-\frac{1}{4}=\frac{5}{3}\)
\(\Rightarrow x=\frac{23}{12}\)
\(x:\frac{5}{11}=22\)
\(\Rightarrow x=10\)
\(\frac{2}{4}+x=1\)
\(\Rightarrow x=\frac{1}{2}\)
\(x-\frac{11}{5}=\frac{2}{5}:\frac{2}{3}\)
\(\Rightarrow x-\frac{11}{5}=\frac{3}{5}\)
\(\Rightarrow x=\frac{18}{5}\)
\(a)x-\frac{1}{4}=\frac{5}{3}\)
\(\Rightarrow x=\frac{5}{3}+\frac{1}{4}=\frac{23}{12}\)
\(b)x:\frac{5}{11}=22\)
\(\Rightarrow x=22.\frac{5}{11}=10\)
\(c)\frac{2}{4}+x=1\)
\(x=1-\frac{2}{4}=\frac{1}{2}\)
\(d)x-\frac{11}{5}=\frac{2}{5}:\frac{2}{3}\)
\(\Rightarrow x-\frac{11}{5}=\frac{3}{5}\)
\(\Rightarrow x=\frac{3}{5}+\frac{11}{5}=\frac{14}{5}\)
\(\frac{3}{22}\times\frac{3}{11}\times22\)
1.\(=\frac{3\times3\times22}{22\times11\times1}\)
\(=\frac{3\times3}{11\times1}\)
\(=\frac{9}{11}\)
2. \(=\frac{9}{242}\times22\)
\(=\frac{198}{242}\)
\(=\frac{9\times2\times11}{2\times11\times11}\)
\(=\frac{9}{11}\)
\(\left(\frac{1}{2}+\frac{1}{3}\right)\times\frac{2}{5}\)
1.\(=\frac{5}{6}\times\frac{2}{5}\)
\(=\frac{5\times2}{3\times2\times5}\)
\(=\frac{1}{3}\)
2.\(\)\(=\frac{1}{2}\times\frac{2}{5}+\frac{1}{3}\times\frac{2}{5}\)
\(=\frac{1}{5}+\frac{2}{15}\)
\(=\frac{3}{15}+\frac{2}{15}\)
\(=\frac{5}{15}=\frac{1}{3}\)
Have a good day