[tex]4\frac{1}{2}:2=\frac{9}{2}*\frac{1}{2}=\frac{9}{4}=2\frac{1}{4}\\1800\%:2=900\%=9\\7:7^0=7:1=7\\\log_327=3\ \text{ bo }\ 3^3=27\\\sqrt{169}=13[/tex]
