[tex]1) \sqrt{625} + \sqrt{16} - \sqrt{25} = 25 + 4 - 5 = 29 - 5 = 24[/tex]
[tex]2) \sqrt{72} \div 18 = 6 \sqrt{2} \div 18 = \frac{6 \sqrt{2} }{18} = \frac{ \sqrt{2} }{3} [/tex]
[tex]sau[/tex]
[tex] \sqrt{72 \div 18} = \sqrt{4} = 2[/tex]
[tex]3) \sqrt{32} \div \sqrt{8} = 4 \sqrt{2} \div 2 \sqrt{2} = \frac{4 \sqrt{2} }{2 \sqrt{2} } = 2[/tex]
[tex]4) \sqrt{16} = 4[/tex]
