7.5×10−27.5 \times 10^{-2}7.5×10−2
31.80×10−231.80 \times 10^{-2}31.80×10−2
7.5×1027.5 \times 10^{2}7.5×102
31.80×10231.80 \times 10^{2} 31.80×102
