Question

[Nguyễn Thị Nhàn]

\(\frac{1}{2}.\left(\frac{4}{3}+\frac{2}{5}\right)\)\(-\)\(\frac{3}{4}.\left(\frac{8}{9}+\frac{16}{3}\right)\)=?

Giúp mình nha mình đang cần gấp!!!!!!!!!!!!

Answer 1

[Võ Đông Anh Tuấn]

\(\frac{1}{2}.\left(\frac{4}{3}+\frac{2}{5}\right)-\frac{3}{4}.\left(\frac{8}{9}+\frac{16}{3}\right)\)

\(=\frac{1}{2}.\left(\frac{20}{15}+\frac{6}{15}\right)-\frac{3}{4}.\left(\frac{8}{9}+\frac{48}{9}\right)\)

\(=\frac{1}{2}.\frac{26}{15}-\frac{3}{4}.\frac{56}{9}\)

\(=\frac{13}{15}-\frac{14}{3}\)

\(=-\frac{19}{5}\)

Answer 2

[soyeon_Tiểu bàng giải]

\(\frac{1}{2}.\left(\frac{4}{3}+\frac{2}{5}\right)-\frac{3}{4}.\left(\frac{8}{9}+\frac{16}{3}\right)\)

\(=\left(\frac{1}{2}.\frac{4}{3}+\frac{1}{2}.\frac{2}{5}\right)-\left(\frac{3}{4}.\frac{8}{9}+\frac{3}{4}.\frac{16}{3}\right)\)

\(=\left(\frac{2}{3}+\frac{1}{5}\right)-\left(\frac{2}{3}+4\right)\)

\(=\frac{2}{3}+\frac{1}{5}-\frac{2}{3}-4\)

\(=\frac{1}{5}-4\)

\(=\frac{1}{5}-\frac{20}{5}=\frac{-19}{5}\)