1.

\sqrt{\frac{225}{729}}-\sqrt{\frac{25}{144}} \div \sqrt{\frac{16}{81}}

Answer»

(15/27 - 5/12) ÷ 4/9

= 180-135/324 ÷ 4/9

= 45/324 * 9/4

= 45*9/324*4

= 45/36*4

= 45/144

= 5/16



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