10:15 ; \(\dfrac{16}{9}\):\(\dfrac{16}{24}\) ; \(\dfrac{2}{3}\):\(\dfrac{1}{4}\) ; 16:(-4) ; 14:21 ; -5:15 ; 12:(-3) ; -1,2:3,6
10:15=\(\dfrac{2}{3}\) ;\(\dfrac{16}{24}\)=\(\dfrac{2}{3}\) ;16:(-4)=-4 ;14:21=\(\dfrac{2}{3}\) :-5:15=\(\dfrac{-1}{3}\) ;12:(-3)=-4
-1,2:3,6=\(\dfrac{-1}{3}\)
Ta có các tỉ lệ thức: \(\dfrac{10}{15}\)=\(\dfrac{16}{24}\)=\(\dfrac{14}{21}\)=\(\dfrac{2}{3}\) ;\(\dfrac{16}{-4}\)=\(\dfrac{12}{-3}\)=-4 ;\(\dfrac{-5}{15}\)=\(\dfrac{-1,2}{3,6}\)=\(\dfrac{-1}{3}\)