Bonjour,
[tex]\mathrm{A} = 152 \times 10^{-4} +32 \times 10^{-3}-10^{-5}\\ =10^{-3}\left(152\times 10^{-1}+32-10^{-2}\right)\\ =10^{-3}\left(15{,}2+32-0{,}01\right)\\ =47{,}19\times 10^{-3}\\ =0{,}04719 = 4{,}719 \times 10^{-2}[/tex]
[tex]\mathrm{B} = -4^2 +10^3 \times 10^{-1} +(-3)^2\\ =-16 +10^2+9\\ =-7+10^2\\ =93[/tex]
[tex]\mathrm{C} = \frac{3\times 10^{5}\times 2 \times 10^{-2}}{8 \times 10^{4}}\\ =\frac{6 \times 10^3}{8 \times 10^4}\\ =\frac{3\times 10^{-1}}{4} = 0{,}075 = 7{,}5 \times 10^{-2}[/tex]
