Using Standard Form

Question 1:

8.2 \times 10^{-4} + 2 \times 10^{-2}

2.082 \times 10^{-2}

Question 2:

6.2 \times 10^{-5} - 1.1 \times 10^{-7}

6.189 \times 10^{-5}

Question 3:

3.4 \times 10^{3} \times 2 \times 10^{6}

6.8 \times 10^{9}

Question 4:

\frac{7 \times 10^{4}}{9.6 \times 10^{-5}}

7.29 \times 10^{8}