[latex]1 \frac{1}{3} +3+(-1 \frac{7}{12} )[/latex][latex](0.1)^{2} * 10^{4}* 3^{2} [/latex]

1)  =[latex]\frac{4}{3}} + \frac{9}3} - \frac{19}{12} = \frac{13}{12} - \frac{19}{12} =- \frac{6}{12} =- \frac{1}{2} [/latex] 2) = 0,01*10000*9 = 100*9=900