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How to Put Exponents in Ti 83 Plus Calculator

Reviewed by Calculator Editorial Team

The TI-83 Plus calculator is a powerful tool for mathematical calculations, including working with exponents. This guide will walk you through the proper methods for entering and calculating exponents on your TI-83 Plus.

Basic Exponent Entry

To enter a simple exponent expression like 2³ (2 raised to the power of 3), follow these steps:

  1. Press the 2 key to enter the base number.
  2. Press the ^ key (located above the 6 key).
  3. Press the 3 key to enter the exponent.
  4. Press ENTER to calculate the result.

Example:

For 5² (5 squared), press: 5 ^ 2 ENTER

Result: 25

The general format for exponent entry is: base ^ exponent

Scientific Notation

For very large or very small numbers, you can use scientific notation:

  1. Enter the coefficient (a number between 1 and 10).
  2. Press the ^ key.
  3. Enter the exponent.
  4. Press the EE key (located above the 5 key) for scientific notation.

Example:

For 3.2 × 10⁵, press: 3.2 ^ 5 EE

Result: 320000

Scientific notation is useful for numbers with many zeros or very small decimal values.

Negative Exponents

Negative exponents represent reciprocals:

  1. Enter the base number.
  2. Press the ^ key.
  3. Press the - key followed by the exponent.
  4. Press ENTER.

Example:

For 2⁻³, press: 2 ^ - 3 ENTER

Result: 0.125 (which is 1/8)

x⁻ⁿ = 1/xⁿ

Fractional Exponents

Fractional exponents represent roots:

  1. Enter the base number.
  2. Press the ^ key.
  3. Enter the numerator of the fraction.
  4. Press the / key.
  5. Enter the denominator of the fraction.
  6. Press ENTER.

Example:

For the square root of 16 (16^(1/2)), press: 16 ^ 1 / 2 ENTER

Result: 4

x^(1/n) = n√x

Common Mistakes

When working with exponents on the TI-83 Plus, avoid these common errors:

  • Forgetting to press the ^ key before entering the exponent.
  • Using the * key instead of ^ for exponents.
  • Not pressing ENTER after completing the expression.
  • Confusing exponent notation with multiplication (e.g., 2*3 is 6, while 2^3 is 8).

Always double-check your entry before pressing ENTER to avoid calculation errors.

Frequently Asked Questions

How do I enter exponents with decimal numbers?

Enter the decimal number first, then press the ^ key, and finally enter the exponent. For example, for 1.5³, press: 1.5 ^ 3 ENTER.

Can I use parentheses with exponents?

Yes, you can use parentheses to group expressions. For example, for (2+3)², press: ( 2 + 3 ) ^ 2 ENTER.

How do I calculate exponents of negative numbers?

Enter the negative number first, then press the ^ key, and finally enter the exponent. For example, for (-2)⁴, press: ( - 2 ) ^ 4 ENTER.