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\(\frac{11}{132}=\frac{1}{12}\)
\(\frac{63}{91}=\frac{9}{13}\)
\(\frac{270}{450}=\frac{3}{5}\)
\(\frac{51}{680}=\frac{3}{40}\)
\(\frac{225}{315}=\frac{5}{7}\)
\(\frac{234}{1404}=\frac{1}{6}\)
\(\frac{11}{132}=\frac{11:11}{132:11}=\frac{1}{12}\)
\(\frac{63}{91}=\frac{63:7}{91:7}=\frac{9}{13}\)
\(\frac{270}{450}=\frac{270:90}{450:90}=\frac{3}{5}\)
\(\frac{51}{680}=\frac{51:17}{680:17}=\frac{3}{40}\)
\(\frac{225}{315}=\frac{225:45}{315:45}=\frac{5}{7}\)
\(\frac{234}{1404}=\frac{234:234}{1404:234}=\frac{1}{6}\)
\(\frac{48}{96}=\frac{48:48}{96:48}=\frac{1}{2}\)
\(\frac{42}{98}=\frac{42:14}{98:14}=\frac{3}{7}\)
\(\frac{80}{240}=\frac{80:80}{240:80}=\frac{1}{3}\)
\(\frac{75}{100}=\frac{75:25}{100:25}=\frac{3}{4}\)
\(\frac{64}{720}=\frac{64:16}{720:16}=\frac{4}{45}\)
\(\frac{15}{120}=\frac{15:15}{120:15}=\frac{1}{8}\)
48/96=1/2
42/98=3/7
80/240=1/3
75/100=3/4
64/720=4/45
15/120=1/8
1313/1717 = ( 1313 :101)/(1717:101)=13/17
171717/191919=(171717:10101)/(191919:10101)=17/19
231231/343343=(231231:7007)/(343343:7007)=33/49
373737/494949=(373737:10101)/(494949:10101)=37/49
\(\frac{90}{75}=\frac{90:15}{75:15}=\frac{6}{5}\)
\(\frac{56}{63}=\frac{56:7}{63:7}\frac{8}{9}\)
\(\frac{632}{848}=\frac{632:8}{848:8}=\frac{79}{106}\)
Rút gọn các phân số sau :
\(\frac{18}{30}=\frac{18\div6}{30\div6}=\frac{3}{5}\)
\(\frac{64}{80}=\frac{64\div16}{80\div16}=\frac{4}{5}\)
\(\frac{36}{27}=\frac{36\div9}{27\div9}=\frac{4}{3}\)
\(\frac{45}{35}=\frac{45\div5}{35\div5}=\frac{9}{7}\)
A,các phân số tối giản là:\(\frac{49}{51},\frac{52}{53},\frac{31}{33},\frac{41}{43}\)
B,rút gọn các phân số còn lại là:\(\frac{12}{36}=\frac{1}{3},\frac{49}{84}=\frac{7}{12},\frac{36}{120}=\frac{3}{10},\frac{27}{108}=\frac{1}{4},\frac{75}{145}=\frac{15}{29}\)
Bài 1 :
\(\frac{22}{55}=\frac{22:11}{55:11}=\frac{2}{5}\)
\(\frac{63}{81}=\frac{63:9}{81:9}=\frac{7}{9}\)
Bài 2 :
\(\frac{3}{16}=\frac{3\times24\times56}{16\times24\times56}=\frac{4032}{21504}\)
\(\frac{5}{24}=\frac{5\times16\times56}{24\times16\times56}=\frac{4480}{21504}\)
\(\frac{21}{56}=\frac{21\times24\times16}{56\times24\times16}=\frac{8064}{21504}\)
Học tốt # ^-<
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
\(\frac{20}{5}=\frac{120}{30};\frac{7}{6}=\frac{35}{30}\)
\(\frac{1}{6}\) \(\frac{7}{9}\) \(\frac{1}{12}\)
\(\frac{5}{12}và\frac{9}{12}\) \(\frac{120}{30}và\frac{35}{30}\)
\(\frac{2}{2}\)=\(\frac{1}{1}\)= 1 ;\(\frac{8}{10000}\)= \(\frac{1}{1250}\)
\(\frac{90}{100}=\frac{90:10}{100:10}=\frac{9}{10}\)
\(\frac{64}{128}=\frac{64:64}{128:64}=\frac{1}{2}\)
\(\frac{17}{51}=\frac{17:17}{51:17}=\frac{1}{3}\)
\(\frac{152}{608}=\frac{152:152}{608:152}=\frac{1}{4}\)
\(\frac{63}{315}=\frac{63:63}{315:63}=\frac{1}{5}\)