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\(\frac{2}{3}\) + \(\frac{3}{4}\) = \(\frac{8}{12}\) + \(\frac{9}{12}\) = \(\frac{17}{12}\)
\(\frac{5}{6}\) x \(\frac{4}{15}\) = \(\frac{2}{9}\)
\(\frac{4}{5}\) - \(\frac{2}{7}\) = \(\frac{28}{35}\) - \(\frac{10}{35}\) = \(\frac{18}{35}\)
\(\frac{13}{9}\) : \(\frac{5}{6}\) = \(\frac{13}{9}\) x \(\frac{6}{5}\) = \(\frac{26}{15}\)
chúc bạn hok tốt !
\(\frac{2}{3}+\frac{3}{4}=\frac{8}{12}+\frac{9}{12}=\frac{17}{12}\)
\(\frac{5}{6}\) x \(\frac{4}{15}\) \(=\frac{5x6}{6x15}=\frac{1}{3}\)
\(\frac{4}{5}-\frac{2}{7}=\frac{28}{35}-\frac{10}{35}=\frac{18}{35}\)
\(\frac{13}{9}:\frac{5}{6}=\frac{13}{9}x\frac{6}{5}=\frac{13x6}{9x5}=\frac{26}{15}\)
Chúc bạn học tốt !
\(\frac{3}{8}+\frac{4}{5}=\frac{15}{40}+\frac{32}{40}=\frac{47}{40}\)
a) \(\left(x+\frac{7}{4}\right)\times\frac{3}{2}=6\)
\(\Leftrightarrow\left(x+\frac{7}{4}\right)=6\div\frac{3}{2}\)
\(\Leftrightarrow x+\frac{7}{4}=4\)
\(\Leftrightarrow x=4-\frac{7}{4}\)
\(\Leftrightarrow x=\frac{9}{4}\)
b) \(x\div\frac{3}{5}+\frac{2}{5}=\frac{9}{5}\)
\(\Leftrightarrow x\div\frac{3}{5}=\frac{9}{5}-\frac{2}{5}\)
\(\Leftrightarrow x\div\frac{3}{5}=\frac{7}{5}\)
\(\Leftrightarrow x=\frac{7}{5}\times\frac{3}{5}\)
\(\Leftrightarrow x=\frac{21}{25}\)
c) \(\frac{1}{2}\div3+x=\frac{5}{3}\)
\(\Leftrightarrow\frac{1}{6}+x=\frac{5}{3}\)
\(\Leftrightarrow x=\frac{5}{3}-\frac{1}{6}\)
\(\Leftrightarrow x=\frac{3}{2}\)
\(\frac{5}{12}-\frac{7}{32}:\frac{21}{16}=\frac{5}{12}-\frac{7}{32}\times\frac{16}{21}=\frac{5}{12}-\frac{112}{672}=\frac{5}{12}-\frac{2}{12}=\frac{3}{12}=\frac{1}{4}\)
\(\frac{5}{12}-\frac{7}{32}:\frac{21}{16}\)
= \(\frac{5}{12}-\frac{1}{6}\)
= \(\frac{1}{4}\)
\(1,\frac{3}{5}+\frac{7}{2}-\frac{4}{7}=\frac{42}{70}+\frac{245}{70}-\frac{40}{70}=\frac{247}{70}\)
\(2,\frac{4}{5}-\frac{1}{3}+\frac{3}{4}=\frac{48}{60}-\frac{20}{60}+\frac{45}{60}=\frac{73}{60}\)
\(3,\frac{1}{3}\times\frac{5}{7}:\frac{7}{2}=\frac{5}{21}:\frac{7}{2}=\frac{10}{147}\)
\(4,\frac{1}{2}:\frac{2}{7}\times\frac{4}{7}=\frac{7}{4}\times\frac{4}{7}=1\)
\(5,\frac{19}{15}\times\frac{3}{7}:\frac{4}{9}=\frac{19}{35}:\frac{4}{9}=\frac{171}{140}\)
\(6,\frac{11}{3}:\frac{9}{16}:\frac{3}{8}=\frac{176}{27}:\frac{3}{8}=\frac{1408}{81}\)
_Chúc bạn học tốt _
\(\frac{7}{9}.\frac{3}{4}:\frac{5}{8}=\frac{7}{12}:\frac{5}{8}=\frac{7}{12}.\frac{8}{5}=\frac{14}{15}\)
a) Ta thấy : 4/5 < 1 ; 15/14 > 1
nên 4/5 < 15/14
b) Ta thấy : 89/88 > 1 ; 100/101 < 1
nên 89/88 > 100/101
c) Ta có : 300/901 < 300/900 = 1/3
nên 300/901 < 1/3
d) Ta có : 5/10 = 1/2 = 1000/2000
Ta thấy 1000/2000 < 1001/2000
nên 5/10 < 1001/2000
46/35 nha bn. mk quen nhau rùi mà
Bằng 46/35
KB và cho mk 1 L-I-K-E nha !!!