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MSC:144
5/9 =5.16 / 9.16 = 80/144
3/16 =3.9 / 16.9 = 27/144
\(\frac{3}{5}=\frac{3\times8}{5\times8}=\frac{24}{40}\)
\(\frac{3}{8}=\frac{3\times5}{8\times5}=\frac{15}{40}\)
\(\frac{3}{10}=\frac{3\times4}{10\times4}=\frac{12}{40}\)
\(\frac{3}{2}=\frac{3\times20}{2\times20}=\frac{60}{40}\)
\(\dfrac{7\times2}{1\times2}=\dfrac{14}{2},\dfrac{9}{2};\dfrac{81\times3}{7\times3}=\dfrac{243}{21},\dfrac{9}{21}\\ \dfrac{4\times2}{3\times2}=\dfrac{8}{6},\dfrac{16}{6};\dfrac{5\times3}{2\times3}=\dfrac{15}{6},\dfrac{19\times2}{3\times2}=\dfrac{38}{6}\)
\(\frac{3}{5}=\frac{24}{40};\frac{3}{8}=\frac{15}{40};\frac{3}{10}=\frac{12}{40};\frac{3}{2}=\frac{60}{40}\)
\(\frac{3}{5}=\frac{3\times8}{5\times8}=\frac{24}{40}\)
\(\frac{3}{8}=\frac{3\times5}{8\times5}=\frac{15}{40}\)
\(\frac{3}{10}=\frac{3\times4}{10\times4}=\frac{12}{40}\)
\(\frac{3}{2}=\frac{3\times20}{2\times20}=\frac{60}{40}\)
\(a,\dfrac{3}{9}=\dfrac{1}{3}\\ \dfrac{16 }{24}=\dfrac{2}{3}\\ b,\dfrac{17}{51}=\dfrac{1}{3}=\dfrac{5}{15}\\ \dfrac{18}{90}=\dfrac{1}{5}=\dfrac{3}{15}\\ c,\dfrac{5}{10}=\dfrac{1}{2}=\dfrac{3}{6}\\ \dfrac{15}{45}=\dfrac{1}{3}=\dfrac{2}{6}\\ d,\dfrac{42}{63}=\dfrac{2}{3}=\dfrac{6}{9}\\ \dfrac{64}{72}=\dfrac{8}{9}\)
\(\frac{5}{9}=\frac{5\times16}{9\times16}=\frac{80}{144}\)
\(\frac{3}{16}=\frac{3\times9}{16\times9}=\frac{27}{144}\)
HT
TL:
\(\frac{5}{9}\)=\(\frac{5x16}{9x16}=\frac{80}{144}\)
\(\frac{3}{16}=\frac{3x9}{16x9}=\frac{27}{144}\)
HT
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Học tốt!:)