Question

$\sqrt{7.5} \times \sqrt{0.3}$

Answer 1

$\sqrt{7.5} \times \sqrt{0.3} = \sqrt{7.5 \times 0.3} = \sqrt{2.25} = \sqrt{ \frac{225}{100} } = \sqrt{ \frac{225 \div 25}{100 \div 25} } = \sqrt{ \frac{9}{4} } = \frac{3}{2} = 1.5$