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How to Put Fractions Into A Ti 84 Plus Calculator

Reviewed by Calculator Editorial Team

Working with fractions on the TI-84 Plus calculator is straightforward once you understand the proper input methods. This guide will walk you through entering fractions, performing calculations with them, and converting between fraction and decimal formats.

Entering Fractions on the TI-84 Plus

The TI-84 Plus calculator has two main ways to enter fractions: as improper fractions or as mixed numbers. Here's how to do both:

Improper Fraction Format

To enter an improper fraction (where the numerator is larger than the denominator), simply type the numerator, then the fraction bar (using the MATH key), and finally the denominator.

Example: For 5/2, press 5, then [MATH], then select the fraction template (option 1), then press 2.

Tip: The fraction bar is located under the MATH key. Press [MATH] and select option 1 to insert it.

Mixed Number Format

For mixed numbers (a whole number combined with a fraction), enter the whole number first, then the fraction bar, and finally the fraction.

Example: For 3 1/2, press 3, then [MATH] to insert the fraction bar, then press 1, then 2.

Example: Entering 7/4

  1. Press the [MATH] key
  2. Select option 1 (fraction template)
  3. Enter the numerator (7)
  4. Press the fraction bar (which appears between the numbers)
  5. Enter the denominator (4)

Using Fractions in Calculations

Once you've entered fractions, you can use them in various calculations:

Addition and Subtraction

To add or subtract fractions, simply enter the fractions with the appropriate operation between them. The calculator will automatically find a common denominator if needed.

Multiplication and Division

Multiply or divide fractions by entering them with the multiplication or division symbol between them.

Example Calculation

Calculate (3/4) × (5/6):

  1. Enter 3 [MATH] 4
  2. Press [×]
  3. Enter 5 [MATH] 6
  4. Press [ENTER]

The result will be 15/24, which the calculator will automatically simplify to 5/8.

Exponentiation

To raise a fraction to a power, enter the fraction first, then press [^], and finally enter the exponent.

Converting Fractions to Decimals

The TI-84 Plus can convert fractions to decimal form using the CONVERT function:

  1. Press [2ND] [MODE] to access the CONVERT menu
  2. Select option 1 (Fraction to Decimal)
  3. Enter the fraction
  4. Press [ENTER]

Note: The calculator will display the decimal approximation of the fraction. For exact values, fractions remain the preferred format.

Troubleshooting Common Issues

If you're having trouble with fractions on your TI-84 Plus, try these solutions:

Fraction Doesn't Display Properly

  • Make sure you've pressed [ENTER] after entering the fraction
  • Check that you've used the correct fraction bar (MATH option 1)
  • Ensure your calculator is in the correct mode (press [MODE] to check)

Calculator Doesn't Simplify Fractions

The TI-84 Plus automatically simplifies fractions during calculations, but you can manually simplify by dividing numerator and denominator by their greatest common divisor.

Fraction Bar Doesn't Appear

If the fraction bar isn't showing, make sure you've pressed [MATH] first, then selected option 1.

FAQ

Can I enter fractions in scientific notation on the TI-84 Plus?
No, the TI-84 Plus does not support scientific notation for fractions. You must enter them in standard fraction format.
How do I clear a fraction from the calculator?
Press [2ND] [CLEAR] to clear the entire display, or press [DEL] to delete the fraction one character at a time.
Can I use fractions in statistics calculations?
Yes, you can enter fractions in the statistics functions, but the calculator will convert them to decimals for calculations.
How do I store a fraction in a variable?
Enter the fraction, then press [STO] followed by the variable name (e.g., A, B, etc.) to store it.