1) \(24=2^3.3\)
\(108=2^2.3^3\)
\(\Rightarrow\text{Ư}CLN_{\left(24;108\right)}=2^2.3=12\)
\(\Rightarrow BCNN_{\left(24;108\right)}=2^3.3^3=216\)
2) \(30=2.3.5\)
\(90=2.3^2.5\)
\(\Rightarrow\text{Ư}CLN_{\left(30;90\right)}=2.3.5=30\)
\(\Rightarrow BCNN_{\left(30;90\right)}=2.3^2.5=90\)
3)\(28=2^2.7\)
\(21=3.7\)
\(5=5\)
\(\Rightarrow\text{Ư}CLN_{\left(28;21;5\right)}=1\)
\(\Rightarrow BCNN_{\left(28;21;5\right)}=2^2.7.3.5=420\)
4) \(24=2^3.3\)
\(36=2^2.3^2\)
\(60=2^2.3.5\)
\(\Rightarrow\text{Ư}CLN_{\left(24;36;60\right)}=2^2.3=12\)
\(\Rightarrow BCNN_{\left(24;36;60\right)}=2^3.3^2.5=360\)
chúc bạn học giỏi ^^
Chúc bạn học giỏi
Mình cảm ơn bạn nha
