# ASVAB Mathematics Knowledge Practice: Scientific Notation

Scientific notation is a simple way to deal with long numbers. Because it’s so common, you can expect to run into a few questions on the Mathematics Knowledge subtest on the ASVAB that involve scientific notation.

## Practice questions

- If you multiply
what is the result?

- What number does
represent?

**A.**854,345

**B.**8,543,450

**C.**0.0854345

**D.**0.854345

## Answers and explanations

- The correct answer is
**Choice (A).**Multiply the numeric parts of the problem:

Multiply the powers of ten by adding the exponents:

Write the answer as the product of the two numbers:

The first number isn’t between 1 and 10, which means you need to move the decimal point one place to the left and add 1 to the exponent to arrive at

- The correct answer is
**Choice (D).**The exponent is –3, which tells you that you need to move the decimal point three places to the left (a positive exponent tells you to move the decimal to the right).