54/31 : 12/64 - 8 = 40/31
k nhé:))
\(=\frac{40}{31}\)
\(\frac{54}{31}\div\frac{12}{64}-8\)
\(=\frac{54}{31}\div\frac{3}{16}-8\)
\(=\frac{288}{31}-\frac{8}{1}\)
\(=\frac{288}{31}-\frac{248}{31}\)
\(=\frac{40}{31}\)
HT
còn ai nx ko zậy để tui tíc nè