Toán . Quy đồng mẫu các phân số: 8/3 , -4/5 , 5/7 09/10/2021 By Serenity . Quy đồng mẫu các phân số: 8/3 , -4/5 , 5/7
8/3 ; -4/5 ; 5/7 MC=BCNN( 3, 5, 7)=105 Suy ra 8/3=8.35/3.35=280/105 -4/5=-4.21/5.21=-84/105 5/7=5.15/7.15=75/105 @ chúc hok tốt Trả lời
$\frac{8}{3}$ = $\frac{8.35}{3.35}$ = $\frac{280}{105}$ $\frac{-4}{5}$ = $\frac{-4.21}{5.21}$ = $\frac{-84}{105}$ $\frac{5}{7}$ = $\frac{5.15}{7.15}$ = $\frac{75}{105}$ Trả lời
8/3 ; -4/5 ; 5/7
MC=BCNN( 3, 5, 7)=105
Suy ra
8/3=8.35/3.35=280/105
-4/5=-4.21/5.21=-84/105
5/7=5.15/7.15=75/105
@ chúc hok tốt
$\frac{8}{3}$ = $\frac{8.35}{3.35}$ = $\frac{280}{105}$
$\frac{-4}{5}$ = $\frac{-4.21}{5.21}$ = $\frac{-84}{105}$
$\frac{5}{7}$ = $\frac{5.15}{7.15}$ = $\frac{75}{105}$