Question

[Nguyễn Trọng Đức]

giải hộ mình đi

Answer 1

[ミ★ғox♥️ʀồɴԍ★彡乡]

a)3/5x8/27x5/3=3/5x5/3x8/27=1x8/27=8/27

b)7/20+1/12+3/20+6/12=7/20+3/20+1/12+6/12=1/2+7/12=13/12

c)7/19x1/3+2/3+7/19=7/19x(1/3+2/3)=7/19x1=7/19

HT

Answer 2

[Ga'l wes]

\(a)\frac{3}{5}\times\frac{8}{27}\times\frac{5}{3}\)

\(=\frac{3}{5}\times\frac{5}{3}\times\frac{8}{27}\)

\(=1\times\frac{8}{27}=\frac{8}{27}\)

\(c)\frac{7}{20}+\frac{1}{12}+\frac{3}{20}+\frac{6}{12}\)

\(=\left(\frac{7}{20}+\frac{3}{20}\right)+\left(\frac{1}{12}+\frac{6}{12}\right)\)

\(=\frac{1}{2}+\frac{7}{12}\)

\(=\frac{13}{12}\)

\(b)\frac{7}{19}\times\frac{1}{3}+\frac{2}{3}\times\frac{7}{19}\)

\(=\frac{7}{19}\times\left(\frac{1}{3}+\frac{2}{3}\right)\)

\(=\frac{7}{19}\times1=\frac{7}{19}\)