$\dfrac{4 × 15 × 9 × 24}{3 × 12 × 8 × 5}$ `= `$\dfrac{2 × 2 × 3 × 5 × 3 × 3 × 2 × 2 × 2 × 3}{3 × 2 × 2 × 3 × 2 × 2 × 2 × 5}$ `= `$\dfrac{3 × 3}{1}$ `= 9.` Trả lời
$\dfrac{4 × 15 × 9 × 24}{3 × 12 × 8 × 5}$ `⇔` $\dfrac{4 × 5 × 3 × 3 × 3 × 8 × 3}{3 × 4 × 3 × 8 × 5}$ `⇔` `3 × 3` `= 9` Trả lời
$\dfrac{4 × 15 × 9 × 24}{3 × 12 × 8 × 5}$
`= `$\dfrac{2 × 2 × 3 × 5 × 3 × 3 × 2 × 2 × 2 × 3}{3 × 2 × 2 × 3 × 2 × 2 × 2 × 5}$
`= `$\dfrac{3 × 3}{1}$
`= 9.`
$\dfrac{4 × 15 × 9 × 24}{3 × 12 × 8 × 5}$
`⇔` $\dfrac{4 × 5 × 3 × 3 × 3 × 8 × 3}{3 × 4 × 3 × 8 × 5}$
`⇔` `3 × 3`
`= 9`