a) MSC là : 9
b) MSC là : 20
c) MSC là : 75
\(a,MSC:9\\ \dfrac{2}{3}=\dfrac{2\times3}{3\times3}=\dfrac{6}{9}\\ b,MSC:20\\\dfrac{4}{10}=\dfrac{4\times2}{2\times10}=\dfrac{8}{20}\\ c,MSC:75\\ \dfrac{9}{25}=\dfrac{9\times3}{25\times3}=\dfrac{27}{75}\)
a. MSC: 27
b. MSC: 20
c. MSC: 75
tui là lớp 5 có j hó cứ gọi tui quảng cáo theess thui bye
a)\(\dfrac{7}{9}và\dfrac{2}{3}\) \(MSC:9\)
Giữ nguyên \(\dfrac{7}{9}\)
\(\dfrac{2}{3}=\dfrac{2.2}{3.2}=\dfrac{4}{9}\)
b)\(\dfrac{4}{10}và\dfrac{11}{20}\) \(MSC:20\)
\(\dfrac{4}{10}=\dfrac{4.2}{10.2}=\dfrac{8}{20}\)
Giữ nguyên \(\dfrac{11}{20}\)
c)\(\dfrac{9}{25}và\dfrac{16}{75}\) \(MSC:75\)
\(\dfrac{9}{25}=\dfrac{9.3}{25.3}=\dfrac{27}{75}\)
Giữ nguyên \(\dfrac{16}{75}\)