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\(\frac{272727}{323232}=\frac{27\times10101}{32\times10101}=\frac{27}{32}\)
\(\frac{430430}{560560}=\frac{10010\times43}{10010\times56}=\frac{43}{56}\)
ta co \(\frac{272727}{323232}=\frac{27}{32};\frac{430430}{560560}=\frac{43}{56}\)
vi 27/32>43/56
=> ..............
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1
\(\frac{2}{12;}=\frac{1}{6}\)
\(\frac{42}{63}=\frac{1}{2}\)
\(\frac{5}{60}=\frac{1}{12}\)
2.
\(\frac{3}{4}=\frac{15}{12}\) số còn lại giữ nguyên
\(\frac{20}{5}=\frac{120}{30};\frac{7}{6}=\frac{35}{30}\)
\(\frac{1}{6}\) \(\frac{7}{9}\) \(\frac{1}{12}\)
\(\frac{5}{12}và\frac{9}{12}\) \(\frac{120}{30}và\frac{35}{30}\)
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\(\frac{15}{18}=\frac{5}{6}\); \(\frac{27}{135}=\frac{1}{5}\); \(\frac{28}{56}=\frac{1}{2}\)
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3 x 5 x 7/ 21 x 10
=(3 x 7) x 5/21 x 10
=21 x 5/21 x 5 x 2=1/2
đap số:...
\(\frac{3\times5\times7}{21\times10}=\frac{3\times5\times7}{3\times5\times7\times2}=\frac{1}{2}\)
\(\frac{150}{250}\)=\(\frac{3}{5}\)
\(\frac{1000}{2000}\)=\(\frac{1}{2}\)
\(\frac{150}{250}=\frac{150\div50}{250\div50}=\frac{3}{5}\)