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\(\frac{5}{3}\)x 2 + x : \(\frac{4}{3}\)= \(\frac{29}{7}\)
\(\frac{10}{3}\)+ x : \(\frac{4}{3}\)= \(\frac{29}{7}\)
x : \(\frac{4}{3}\)= \(\frac{29}{7}\)- \(\frac{10}{3}\)
x = \(\frac{17}{21}\)x \(\frac{4}{3}\)
x = \(\frac{68}{63}\)
\(\frac{10}{3}+\frac{x.3}{4}=\frac{29}{7}\)
\(\frac{3x}{4}=\frac{29}{7}-\frac{10}{3}=\frac{17}{21}\)
\(x=\frac{68}{63}\)
a, \(\frac{5}{7}+\frac{8}{7}=\frac{13}{7}\)
b,\(\frac{9}{8}-\frac{3}{8}=\frac{6}{8}\)
c,\(\frac{6}{1}:\frac{6}{5}=\frac{6}{1}\cdot\frac{5}{6}=\frac{30}{6}=5\)
~~~Hok tốt ~~~
a,\(\frac{13}{7}\)
b,\(\frac{6}{8}\)= \(\frac{3}{4}\)
c,\(\frac{9}{7}\)
d,5
\(1,\frac{3}{5}+\frac{7}{2}-\frac{4}{7}=\frac{42}{70}+\frac{245}{70}-\frac{40}{70}=\frac{247}{70}\)
\(2,\frac{4}{5}-\frac{1}{3}+\frac{3}{4}=\frac{48}{60}-\frac{20}{60}+\frac{45}{60}=\frac{73}{60}\)
\(3,\frac{1}{3}\times\frac{5}{7}:\frac{7}{2}=\frac{5}{21}:\frac{7}{2}=\frac{10}{147}\)
\(4,\frac{1}{2}:\frac{2}{7}\times\frac{4}{7}=\frac{7}{4}\times\frac{4}{7}=1\)
\(5,\frac{19}{15}\times\frac{3}{7}:\frac{4}{9}=\frac{19}{35}:\frac{4}{9}=\frac{171}{140}\)
\(6,\frac{11}{3}:\frac{9}{16}:\frac{3}{8}=\frac{176}{27}:\frac{3}{8}=\frac{1408}{81}\)
_Chúc bạn học tốt _
a, \(\frac{5}{11}\times\frac{7}{25}+\frac{15}{11}\times\frac{1}{5}\)
\(=\frac{5}{11}\times\frac{7}{25}+\frac{5}{11}\times\frac{3}{5}\)
\(=\frac{5}{11}\times\left(\frac{7}{25}+\frac{3}{5}\right)\)
\(=\frac{5}{11}\times\frac{22}{25}\)
\(=\frac{2}{5}\)
b, \(\frac{3}{7}\times\frac{25}{19}-\frac{1}{7}\times\frac{18}{19}\)
\(=\frac{1}{7}\times\frac{75}{19}-\frac{1}{7}\times\frac{18}{19}\)
\(=\frac{1}{7}\times\left(\frac{75}{19}-\frac{18}{19}\right)\)
\(=\frac{1}{7}\times3\)
\(=\frac{3}{7}\)
4 x 4 = 16
4 x 1 = 4
4 x 5 = 20
4 x 8 = 32
4 x 9 = 36
9 x 9 = 81
a) \(\frac{3}{5}\times y+\frac{1}{2}:\frac{5}{3}-\frac{5}{4}=\frac{1}{2}\times\frac{1}{3}\)
\(\Rightarrow\frac{3}{5}\times y+\frac{3}{10}-\frac{5}{4}=\frac{1}{6}\)
\(\Rightarrow\frac{3}{5}\times y+\left(-\frac{19}{20}\right)=\frac{1}{6}\)
\(\Rightarrow\frac{3}{5}\times y=\frac{67}{60}\)
\(\Rightarrow y=\frac{67}{36}\)
b) \(\frac{4}{5}:y+\frac{1}{4}\times\frac{1}{6}-\frac{1}{2}=\frac{1}{3}\times\frac{5}{2}\)
\(\Rightarrow\frac{4}{5}:y+\frac{1}{24}-\frac{1}{2}=\frac{5}{6}\)
\(\Rightarrow\frac{4}{5}:y+\left(-\frac{11}{24}\right)=\frac{5}{6}\)
\(\Rightarrow\frac{4}{5}:y=\frac{5}{6}+\frac{11}{24}=\frac{31}{24}\)
\(\Rightarrow y=\frac{4}{5}:\frac{31}{24}=\frac{96}{155}\)
c) \(\frac{3}{5}\times y-\frac{4}{5}:3+\frac{1}{12}=\frac{3}{2}+\frac{1}{5}\)
\(\Rightarrow\frac{3}{5}\times y-\frac{4}{15}+\frac{1}{12}=\frac{17}{10}\)
\(\Rightarrow\frac{3}{5}\times y-\frac{4}{15}=\frac{97}{60}\)
\(\Rightarrow\frac{3}{5}\times y=\frac{113}{60}\)
\(\Rightarrow y=\frac{113}{36}\)
\(x\times\frac{2}{7}-\frac{2}{3}=\frac{1}{2}\)
\(x\times\frac{2}{7}=\frac{1}{2}+\frac{2}{3}=\frac{7}{6}\)
\(x=\frac{7}{6}:\frac{2}{7}=\frac{49}{12}\)
b) \(x:\frac{5}{4}+\frac{4}{5}=2\)
\(x:\frac{5}{4}=2-\frac{4}{5}=\frac{6}{5}\)
\(x=\frac{6}{5}\times\frac{5}{4}=\frac{3}{2}\)
a) \(x\times\frac{2}{7}-\frac{2}{3}=\frac{1}{2}\)
\(\Rightarrow x\times\frac{2}{7}=\frac{1}{2}+\frac{2}{3}\)
\(\Rightarrow x\times\frac{2}{7}=\frac{7}{6}\)
\(\Rightarrow x=\frac{7}{6}\div\frac{2}{7}\)
\(\Rightarrow x=\frac{49}{12}\)
b) \(x\div\frac{5}{4}+\frac{4}{5}=2\)
\(\Rightarrow x\div\frac{5}{4}=2-\frac{4}{5}\)
\(\Rightarrow x\div\frac{5}{4}=\frac{6}{5}\)
\(\Rightarrow x=\frac{6}{5}\times\frac{5}{4}\)
\(\Rightarrow x=\frac{3}{2}\)
bài 1
a) 5x24x36/6x12x10
=5x12x2x6x6/6x12x5x2
=6
b)1/3x5/7+3/9x2/7
=1/3x5/7+1/3*2/7
=1/3x(5/7+2/7)
=1/3x(7/7)
=1/3x1
=1/3
k nha
