Question

[nguyễn phương thảo]

rút gọn p/s

A=3469-54/6938-108

B=2468-98/3702/147

C=1010/1008*8-994

D=1*2*3+2*4*6+3*6*9+5*10*15/1*3*6+2*6*12+3*9*18+5*15*30

ai giúp mk với ai nhanh mk sẽ tick cho nha!

Answer 1

[KAl(SO4)2·12H2O]

\(A=\frac{3469-54}{6938-108}\)

\(=\frac{3415}{6830}\)

\(=\frac{3415}{6830}=\frac{3415:3415}{6830:3415}=\frac{1}{2}=\frac{3}{6}\)

\(B=\frac{2468-89}{3720-147}\)

\(=\frac{2370}{3555}\)

\(=\frac{2370}{3555}=\frac{2370:1185}{3555:1185}=\frac{2}{3}=\frac{4}{6}\)

Answer 2

[nguyễn phương thảo]

bn ơi còn C,D