Rút gọn phân số 14/42
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-24/42=-4/7
-24/36=-2/3
-8/56=-1/7
29/-87=-1/3
51/-18=-17/3
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a ) 1 3 b ) 1 4 c ) − 1 3
d ) 1 2 e ) 1 4 f ) 3 5
g ) 2 3 h ) − 3 2
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Theo thứ tự : 5/6 ; 2/3 ; 2/3 ; 3/2 ; 2/3 ; 3/8 ; 3/1(hay là 3)
\(\dfrac{10}{12}=\dfrac{5}{6}\) \(\dfrac{8}{12}=\dfrac{2}{3}\) \(\dfrac{10}{15}=\dfrac{2}{3}\) \(\dfrac{27}{18}=\dfrac{3}{2}\) \(\dfrac{24}{36}=\dfrac{4}{6}=\dfrac{2}{3}\)
\(\dfrac{18}{48}=\dfrac{3}{8}\) \(\dfrac{42}{14}=\dfrac{6}{2}=\dfrac{3}{1}\)
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a: \(=\dfrac{6\left(12-7\right)}{60}=\dfrac{6\cdot5}{6\cdot10}=\dfrac{5}{10}=\dfrac{1}{2}\)
b: \(=\dfrac{35\cdot\left(18-1\right)}{34\cdot7}=5\cdot\dfrac{1}{2}=\dfrac{5}{2}\)
c: \(=\dfrac{42\left(1-11\right)}{21\cdot\left(-15\right)}=2\cdot\dfrac{-10}{-15}=2\cdot\dfrac{2}{3}=\dfrac{4}{3}\)
d: \(=\dfrac{2^5\cdot3^2}{2^5\cdot3^3}=\dfrac{1}{3}\)
e: \(=\dfrac{-36\cdot14}{27\left(14+7\right)}=\dfrac{-36}{27}\cdot\dfrac{14}{21}=\dfrac{-4}{3}\cdot\dfrac{2}{3}=-\dfrac{8}{9}\)
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\(\dfrac{50}{60}=\dfrac{5}{6}\)
\(\dfrac{33}{11}=3\)
\(\dfrac{16}{60}=\dfrac{4}{15}\)
\(\dfrac{42}{22}=\dfrac{21}{11}\)
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a) \(\frac{15.2-15.4}{15}=\frac{15.\left(2-4\right)}{15}=\frac{15.\left(-2\right)}{15}=\frac{-2}{1}=-2\)
b) \(\frac{3.7.\left(-14\right)}{42.35}=\frac{3.7.7.2.\left(-1\right)}{2.3.7.5.7}=\frac{-1}{5}\)
c) \(\frac{63.5-63.3}{2.\left(-3\right)^3-\left(-3\right)^2}=\frac{63.\left(5-3\right)}{2.\left(-3\right).\left(-3\right)^2-\left(-3\right)^2}=\frac{63.2}{\left(-6\right).\left(-3^2\right)-\left(-3\right)^2.1}=\frac{63.2}{\left(-6-1\right).\left(-3\right)^2}=\frac{63.2}{\left(-7\right).9}=\frac{63.2}{-63}=-2\)
dài dòng quá chả hiểu tí gj cả??????????????????????????????????????
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`a)` Phân số tối giản là: \(\dfrac{2}{3};\dfrac{5}{4};\dfrac{11}{12}\)
`b)` Phân số rút gọn được là: \(\dfrac{28}{14};\dfrac{69}{54}\)
\(\dfrac{28}{14}=\dfrac{28:14}{14:14}=2\)
\(\dfrac{69}{54}=\dfrac{69:3}{54:3}=\dfrac{23}{18}\)
a, phân số tối giản là 2/3; 11/12; 5/4
b, phân số rút gọn được là 28/14=2; 69/54=16/9
bằng 1/3 nha bn
14/42 : 14 = 1/3 nhé
mình giải rồi