Using Standard Form

Question 1:

1.7 \times 10^{4} + 7.4 \times 10^{6}

7.417 \times 10^{6}

Question 2:

8.7 \times 10^{4} - 7.7 \times 10^{2}

8.623 \times 10^{4}

Question 3:

1.2 \times 10^{5} \times 5.8 \times 10^{-5}

6.96 \times 10^{0}

Question 4:

\frac{1 \times 10^{-4}}{6.8 \times 10^{-3}}

1.47 \times 10^{-2}