Question

calculati 1) √625+√16-√25 2) √72:18 3) √32:√8 4) √16

Answer 1

$1) \sqrt{625} + \sqrt{16} - \sqrt{25} = 25 + 4 - 5 = 29 - 5 = 24$

$2) \sqrt{72} \div 18 = 6 \sqrt{2} \div 18 = \frac{6 \sqrt{2} }{18} = \frac{ \sqrt{2} }{3}$

$sau$

$\sqrt{72 \div 18} = \sqrt{4} = 2$

$3) \sqrt{32} \div \sqrt{8} = 4 \sqrt{2} \div 2 \sqrt{2} = \frac{4 \sqrt{2} }{2 \sqrt{2} } = 2$

$4) \sqrt{16} = 4$