Question

giúp mình làm câu 7 và 8 nhé

Answer 1

\(7,MSC:315\\ \dfrac{2}{5}=\dfrac{2.63}{5.63}=\dfrac{126}{315}\\ \dfrac{13}{45}=\dfrac{13.7}{45.7}=\dfrac{91}{315}\\ \dfrac{-12}{35}=\dfrac{-12.9}{35.9}=\dfrac{-108}{315}\\ 8,MSC:102\\ \dfrac{4}{17}=\dfrac{4.6}{17.6}=\dfrac{24}{102}\\ \dfrac{8}{51}=\dfrac{8.2}{51.2}=\dfrac{16}{102}\\ \dfrac{3}{34}=\dfrac{3.3}{34.3}=\dfrac{9}{102}\)

Answer 2

Quy đồng hay so sánh vậy bạn