Left Aligning Multi Column Equations

I’m trying to align multi-column equations to left. But I’m having difficulty with it. For example,

begin{proposition} textbf{Properties of Fractions}
begin{align*}
    &1.frac{a}{b}frac{c}{d} = frac{ac}{bd} &2.frac{a}{b}divfrac{c}{d} = frac{a}{b}cdotfrac{d}{c}
    &3.frac{a}{c}+frac{b}{c} = frac{a+b}{c} &4.frac{a}{b}+frac{c}{d} = frac{ad+bc}{bd}
    &5.frac{ac}{bc} = frac{a}{b} &6. frac{a}{b} = frac{c}{d}implies ad = bc
end{align*}
end{proposition}

But it is rendered like

I’m using bunch of packages like amsmath, amsthm, etc. How can I align the second column left?

*I’ve already tried array environment, but it crashes and looks too small. If I should use array, how can I fix this?