Question l.5: Add 1.95 × 10^-2 and 2.8 × 10^-3.
Add 1.95 \times 10^{-2} and 2.8 \times 10^{-3}.
To add these two numbers, we make both exponents 22. Thus, 2.8 \times 10^{-3} = 0.28 \times 10^{-2}. Now we can add:
\begin{matrix}1.95 \times 10^{-2} \\ +0.28 \times 10^{-2}\\ \hline 2.23 \times 10^{-2}\end{matrix}
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