Question

1.Sắp xếp các phân số sau thứ tự tăng dần

a.\(\frac{-1}{8};\frac{2}{-3};\frac{-5}{6};\frac{-1}{-2}\)

Answer 1

\(\frac{-5}{6};\frac{2}{-3};\frac{-1}{8};\frac{-1}{-2}\)

Answer 2

\(-\frac{5}{6};\frac{2}{-3};\frac{-1}{8}\frac{-1}{-2}\)

Answer 3

a, \(\frac{2}{-3}=\frac{-2}{3}\)

\(\frac{-1}{-2}=\frac{1}{2}\)

\(\frac{-1}{8};\frac{-2}{3};\frac{-5}{6}\)và \(\frac{1}{2}\)MSC: 24

Ta có:

\(\frac{-1}{8}=\frac{-1.3}{8.3}=\frac{-3}{24}\)

\(\frac{-2}{3}=\frac{-2.8}{3.8}=\frac{-16}{24}\)

\(\frac{-5}{6}=\frac{-5.4}{6.4}=\frac{-20}{24}\)

\(\frac{1}{2}=\frac{1.12}{2.12}=\frac{12}{24}\)

Vì \(\frac{-20}{24}< \frac{-16}{24}< \frac{-3}{24}< \frac{12}{24}\)nên \(\frac{-5}{6}< \frac{-2}{3}< \frac{-1}{8}< \frac{1}{2}\)

Vậy ta sắp xếp theo thứ tự tăng dần: \(\frac{-5}{6};\frac{2}{-3};\frac{-1}{8};\frac{-1}{-2}\)