Using Standard Form

Question 1:

5.3 \times 10^{5} + 3.3 \times 10^{7}

3.353 \times 10^{7}

Question 2:

9.5 \times 10^{-6} - 4.9 \times 10^{-7}

9.01 \times 10^{-6}

Question 3:

7.8 \times 10^{-4} \times 6 \times 10^{-4}

4.68 \times 10^{-7}

Question 4:

\frac{8.2 \times 10^{5}}{2.8 \times 10^{4}}

2.93 \times 10^{1}