Lesson 15: Adding and Subtracting with Scientific Notation | Unit 7: Exponents and Scientific Notation

What is the result of the expression $$5.3 \times 10^4 + 4.7 \times 10^4$$ in scientific notation?

Evaluate the expression $$3.7 \times 10^6 - 3.3 \times 10^6$$ and give the answer in scientific notation.

Evaluate the expression $$4.8 \times 10^{-3} + 6.3 \times 10^{-3}$$ and give the answer in scientific notation.

Evaluate the expression $$6.6 \times 10^{-5} - 6.1 \times 10^{-5}$$ and give the answer in scientific notation.

Here are the areas for each of the five Great Lakes:

• Superior: $$8.2 \times 10^4$$ square km
• Huron: $$6.0 \times 10^4$$ square km
• Michigan: $$5.8 \times 10^4$$ square km
• Erie: $$2.6 \times 10^4$$ square km
• Ontario: $$1.9 \times 10^4$$ square km

How much larger is Lake Huron than Lake Michigan? Give your answer with and without scientific notation.

Here are the areas for each of the five Great Lakes:

• Superior: $$8.2 \times 10^4$$ square km
• Huron: $$6.0 \times 10^4$$ square km
• Michigan: $$5.8 \times 10^4$$ square km
• Erie: $$2.6 \times 10^4$$ square km
• Ontario: $$1.9 \times 10^4$$ square km

Which is larger — Lake Michigan and Lake Ontario combined, or Lake Superior? Give the difference with and without scientific notation.

How much larger is Russia than Canada in terms of area?

A teacher tells her students she is just over 1 and $$\frac{1}{2}$$ billion seconds old. What is her age in seconds using scientific notation?