Texas Instruments TI-81 Advanced Scientific Graphics Calculator with Guide Book

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US $1,000.00
ApproximatelyRM 4,135.00
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Condition:
Used
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Pickup:
Free local pickup from Mount Wolf, Pennsylvania, United States.
Shipping:
US $9.06 (approx RM 37.46) USPS Ground Advantage®.
Located in: Mount Wolf, Pennsylvania, United States
Delivery:
Estimated between Mon, 17 Nov and Mon, 24 Nov to 94104
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eBay item number:315999096904
Last updated on Oct 26, 2025 07:03:53 MYTView all revisionsView all revisions

Item specifics

Condition
Used: An item that has been used previously. The item may have some signs of cosmetic wear, but is ...
Country of Origin
Taiwan
Display Size
Regular
Features
Calculus, LCD Display
UPC
0033317073122
Category

About this product

Product Information

Engineered for use for algebra and pre-calculus, the TI-81 graphing calculator is a must-have for students. This Texas Instruments model features a 96 x 64-pixel display and built-in software to enter advanced functions.The TI-81 display is large enough to show eight lines. Each line can be up to sixteen characters long. The number result of the calculation is displayed on the following line of the display. There is also plenty of room on the display to show the resulting graphs, and for more detail, you can use the zoom menu. You can adjust the brightness of the display based on the type of contrast you would like.Because of the calculator's built-in memory, you can enter and save up to 37 of your own programs. The memory also enables several features that can save you time. Among those features is the last entry option, which you can use to build on the previous result to save time in your calculations. To access the last answer menu, just press the 2nd key along with "ANS." The keyboard layout is user-friendly and allows you to quickly locate the most common keys for scientific calculations. Keys on the keyboard are grouped by color and function below the display. There are areas for each mode: editing, graphing, advanced function, and scientific calculator keys. The most common commands can be completed with the press of a key. You can access the second set of commands on the keyboard by using the 2nd key. Editing expressions right on the display is simple. Just press the insert or delete key, or press a cursor-movement key to navigate on the screen. Navigating between menus is simple as well. Just press the key associated with each menu.This Texas Instruments calculator is perfect for using to enter data for graphs. The calculator is capable of graphing up to four functions at a time. The memory allows you to save your complex calculations and information you've entered for later use with a simple stroke of a key. The Texas Instruments TI-81 model can perform one and two-variable statistical analysis. You can enter numbers on the keyboard in scientific notation too.The TI-81 calculator provides all the essentials found in other versions, such as all the key software and features of graphing calculators. TI-Basic code is still used. It keeps this standard item affordable and as functional as other calculators.Taking this calculator on the go is no problem, thanks to its compact design and protective slide case. The display will remain protected even in the roughest of backpacks. Two different types of batteries are used. There are four standard size AAA batteries with a lithium battery for backup.The Texas Instruments TI-81 calculator is perfect for the student in your life. Make your mathematical problems easier with this product, or help someone else get an advantage on homework by gifting them this calculator. The perfect complement to a full computer, the TI-81 has all of the information you'll need for a quick start to any math class.

Product Identifiers

Brand
Texas Instruments
MPN
TI-81
UPC
0033317073122
Model
81
eBay Product ID (ePID)
54843142

Product Key Features

Power Source
Battery
Size
Handheld
Key Size
Regular
Type
Graphing

Additional Product Features

Display Type
Large
Additional Features
Case Included
Digit Display
16 Digits

Item description from the seller

About this seller

Full Send Services

94.1% positive feedback•42 items sold

Joined Aug 2022
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Detailed Seller Ratings

Average for the last 12 months
Accurate description
4.6
Reasonable shipping cost
5.0
Shipping speed
5.0
Communication
4.7

Seller feedback (24)

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  • b***a (220)- Feedback left by buyer.
    Past year
    Verified purchase
    Shipping was fast packaging was excellent. The item was exactly as described and the picture showed that well. There is value in this purchase and I will be using the seller again in the future. Thank you.
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  • 9***h (1294)- Feedback left by buyer.
    Past year
    Verified purchase
    exactly as picture, carefully packaged, shipped fast, Beautiful ornament
    2023 White House Historical Association House Christmas Ornament (#315999189765)
  • l***o (153)- Feedback left by buyer.
    Past year
    Verified purchase
    Quick delivery, useful, as described. Great communication. Thank you!
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