9/13=63/91

8/7=104/91

3/4=36/48

5/12=20/48 nha

~HT~

k cho mình nha

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mình nè

\(\overline{x539y}\)chia 2 dư 1 => y lẻ

\(\overline{x539y}\) chia 5 dư 2 => y=2 hoặc y=7, nhưng do y lẻ => y=7

\(\Rightarrow\overline{x539y}=\overline{x5397}\)chia 9 dư 3 \(\Rightarrow\overline{x5397}-3=\overline{x5394}⋮9\Rightarrow x+5+3+9+4=x+21⋮9\Rightarrow x=6\)

\(\frac{9}{13}\)và\(\frac{8}{7}\)

\(MSC:91\)

\(\frac{9}{13}=\frac{9\times7}{13\times7}=\frac{63}{91}\)

\(\frac{8}{7}=\frac{8\times13}{7\times13}=\frac{104}{91}\)

\(\frac{3}{4}\)và\(\frac{5}{12}\)

\(MSC:48\)

\(\frac{3}{4}=\frac{3\times12}{4\times12}=\frac{36}{48}\)

\(\frac{5}{12}=\frac{5\times4}{12\times4}=\frac{20}{48}\)

\(\frac{5}{6}\)và\(\frac{7}{8}\)

\(MSC:48\)

\(\frac{5}{6}=\frac{5\times8}{6\times8}=\frac{40}{48}\)

\(\frac{7}{8}=\frac{7\times6}{8\times6}=\frac{42}{48}\)

\(\frac{8}{23}\)và\(\frac{47}{69}\)

\(MSC:1577\)

\(\frac{8}{23}=\frac{8\times69}{23\times69}=\frac{552}{1577}\)

\(\frac{47}{69}=\frac{47\times23}{69\times23}=\frac{1081}{1577}\)

Giúp mình với các bạn ơi

1/3;2/6; 3/9;4/12 nha

~HT~

k cho mình nha

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\(\frac{5}{9}\)và\(\frac{7}{8}\)

\(MSC:72\)

\(\frac{5}{9}=\frac{5\times8}{9\times8}=\frac{40}{72}\)

\(\frac{7}{8}=\frac{7\times9}{8\times9}=\frac{63}{72}\)

\(\frac{5}{9},\frac{7}{8}MSC=72\)

=\(\frac{5x8}{9x8}=\frac{40}{72}\)

=\(\frac{7x9}{8x9}=\frac{63}{72}\)

=2114,178723 nha

~HT~

k cho mình nha cảm ơn trước nhé

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thank you