Short Answer 
Exponential notation is a concise way to express large or small numbers, using ‘E’ for simplification. Positive or negative signs before the exponent indicate whether the number represents a large value or a fraction, and examples like 678 can be written as 6.78E2 or 6.78E+2, both conveying the same value.
Understanding Exponential Notation
Exponential or scientific notation is a shorthand way to express very large or small numbers. It saves space and makes it easier to read numbers that can otherwise be cumbersome. In WileyPlus, you use a capital “E” to indicate this notation.
Using Positive and Negative Symbols
To represent the sign of the number, you can add a positive “+” or negative “-” symbol before the exponent. This is crucial for indicating whether the value is a large number or a fraction. For example, a positive exponent shows a number ten or greater, while a negative exponent indicates a fraction.
Examples of Notation
When converting numbers into this format, consider how the number is structured. Here are some examples:
- 678 can be written as 6.78E2
- 678 can also be expressed as 6.78E+2
Both representations convey the same value, demonstrating the use of scientific notation effectively.