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a) 6 000 × 5 : 3 = 30 000 : 3
= 10 000
b) 13 206 × (36 : 9) = 13 206 × 4
= 52 824
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\(3\times\left(\dfrac{6}{7}-\dfrac{2}{3}\right)=3\times\dfrac{4}{21}=\dfrac{12}{21}=\dfrac{4}{7}\)
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a: \(=\dfrac{1}{2}\cdot\dfrac{3}{4}\cdot\dfrac{5}{6}=\dfrac{15}{48}=\dfrac{5}{16}\)
b: \(=\dfrac{2}{3}+\dfrac{12}{42}=\dfrac{2}{3}+\dfrac{2}{7}=\dfrac{20}{21}\)
c: \(=\dfrac{24}{5}\cdot\dfrac{5}{12}=2\)
d: \(=\dfrac{1}{9}+\dfrac{3}{4}=\dfrac{4+27}{36}=\dfrac{31}{36}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(\left(\dfrac{6}{11}+\dfrac{5}{11}\right)\times\dfrac{3}{7}=\dfrac{11}{11}\times\dfrac{3}{7}=1\times\dfrac{3}{7}=\dfrac{3}{7}\)
\(\dfrac{3}{5}\left(\dfrac{7}{9}-\dfrac{2}{9}\right)=\dfrac{3}{5}\times\dfrac{5}{9}=\dfrac{1}{3}\)
95/3-(13/6+3/7)
=95/3-109/42
=407/14
_HT_