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55555+5+55555+55+5555+5+55555+5555555555555555+5555+555555=555555556.10^15
![](https://rs.olm.vn/images/avt/0.png?1311)
\(M=\frac{5555}{6666}-\frac{246246}{369369}+\frac{222222}{151515}\)
\(M=\frac{5}{6}-\frac{2}{3}+\frac{22}{15}\)
\(M=\frac{49}{30}\)
![](https://rs.olm.vn/images/avt/0.png?1311)
\(A=\frac{3333}{4545}+\frac{1}{15}+\frac{1111}{5555}\)
\(=\frac{11}{15}+\frac{1}{15}+\frac{1}{5}\)
\(=\frac{12}{15}+\frac{3}{15}\)
\(=1\)
\(A=\frac{3333}{4545}+\frac{1}{15}+\frac{1111}{5555}\)
\(=\frac{11}{15}+\frac{1}{15}+\frac{1}{5}\)
\(=\frac{12}{15}+\frac{3}{15}\)
\(=1\)
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\(\frac{5+55+555+5555}{9+99+999+9999}=\frac{5.\left(1+11+111+1111\right)}{9.\left(1+11+111+1111\right)}=\frac{5}{9}\)\(\frac{5}{9}\)
dấu chấm bạn cứ hiểu là nhân nhé !
\(\frac{5+55+555+5555}{9+99+999+9999}=\frac{5+11x5+111x5+1111x5}{9+11x9+111x9+1111x9}\)\(=\frac{5x5x5x5}{9x9x9x9}=\frac{625}{6561}\)
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