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a) \(\frac{300}{540}\) = \(\frac{300:60}{540:60}=\frac{5}{9}\)
b)\(\frac{-38}{95}=\frac{-38:19}{95:19}=\frac{-2}{5}\)
c)\(\frac{-68}{-85}=\frac{-68:\left(-17\right)}{-85:\left(-17\right)}=\frac{4}{5}\)
\(a.\frac{35353535}{73737373}=\frac{35353535:1010101}{73737373:1010101}=\frac{35}{73}\)
\(\frac{19}{3}.\frac{9}{38}\)
\(=\frac{19.9}{3.38}\)
\(=\frac{1.3}{1.2}\)
\(=\frac{3}{2}\)
\(=\frac{3}{2}\)
Hok_tốt
Tk nha
#Thiên_Hy
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Bài làm
1.
a) \(\frac{5.7}{14.3}=\frac{5.7}{2.7.3}=\frac{5}{6}\)
b) \(\frac{3.55}{22.9}=\frac{3.5.11}{2.11.3.3}=\frac{5}{6}\)
c) \(\frac{10.63}{15.21}=\frac{2.5.7.3.3}{3.5.7.3}=2\)
d) \(\frac{3.11.13}{26.15}=\frac{3.11.13}{2.13.3.5}=\frac{11}{10}\)
2.
a) \(\frac{7.29+7.14}{43.5-43.11}=\frac{7\left(29+14\right)}{43\left(5-11\right)}=\frac{7.43}{43.-6}=-\frac{7}{6}\)
b) \(\frac{19.15-7.14}{38}=\frac{285-98}{38}=\frac{187}{38}\)
c) \(\frac{53.19-19.2}{7-60}=\frac{19\left(53-2\right)}{7-60}=\frac{19.51}{-53}=-\frac{969}{53}\)
d) \(\frac{120}{24.13-24.2}=\frac{120}{24\left(13-2\right)}=\frac{24.5}{24.11}=\frac{5}{11}\)
-38/95 = -2/5
\(\frac{-38}{95}=\frac{-38:19}{95:19}=\frac{-2}{5}\)