Convert $1.24×10^{3}$ to $\text{___}×10^{4}$. With common scientific notations you can add the numbers.

Write $\frac{4}{8}$ as a decimal $(0.5)$.

Simplify $(\frac{10^5}{10^7})$ using laws of exponents.

So $0.5×10^{-2}$ results. Now rewrite in standard form and convert back to scientific notation.

Use the Commutative Property of Multiplication to reorder the terms, so multiply $(8.5 · 7.6)(10^{10}· 10^{12})$.