Remember that a÷b=a/b. Therefore,
[tex]\begin{gathered} 1\div20=\frac{1}{20}\to\text{true} \\ 5\div4=\frac{5}{4}\to\text{true} \\ 20\div1=\frac{20}{1}=20\ne\frac{1}{20} \\ \Rightarrow20\div1=\frac{1}{20}\to\text{false} \\ 5\div4=\frac{5}{4}\ne\frac{4}{5} \\ \Rightarrow5\div4=\frac{4}{5}\to\text{false} \\ 7\div9=\frac{7}{9}\to\text{true} \\ 9\div7=\frac{9}{7}\ne\frac{7}{9} \\ \Rightarrow9\div7=\frac{7}{9}\to\text{false} \end{gathered}[/tex]
From left to right, 1, 2, and 5 are true whereas 3, 4, and 6 are false.
