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Texas Instruments 81 Graphing Calculator
What You Never Thought You Needed (597)
100% positive feedback
Price:
US $10.95
ApproximatelyAU $16.88
+ $22.72 postage
Returns:
30-day returns. Buyer pays for return postage. If you use an eBay postage label, it will be deducted from your refund amount.
Condition:
Enhance your mathematical experience with the Texas Instruments TI-81 Graphing Calculator. This calculator is perfect for those who love to tackle complex equations and graphs. With its LCD display, calculus features, and programmable functions, solving even the most challenging mathematical problems will be a breeze. This handheld calculator is powered by batteries and comes with a cover for added protection. It is ideal for use in various settings, including business and industrial environments. The Texas Instruments TI-81 Graphing Calculator is a must-have for anyone who values precision and efficiency in their calculations.
- Buy It NowTexas Instruments TI-81 Graphing Calculator with cover , tested working
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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
BrandTexas Instruments
MPNTI-81
UPC0033317073122
Model81
eBay Product ID (ePID)54843142
Product Key Features
Power SourceBattery
SizeHandheld
Key SizeRegular
TypeGraphing
Additional Product Features
Display TypeLarge
Additional FeaturesCase Included
Digit Display16 Digits
All listings for this product
Ratings and reviews
Most relevant reviews
- 29 Oct, 2022Top favourable review
Nice size with clear view of the screen
Great calculator to use for basic and Intro to Algebra. Easy to use also has a clear screen to see well. The size just right to handle!Verified purchase: YesCondition: Pre-owned
- 22 Sep, 2016Top critical review
Not terrible and does work and really cheap
I like this calculator and the price and all, but sometimes the thing won't turn on even with the batteries in there. I've been thinking something's wrong with it but it takes too long for it to come back on and also the screen can be very hard to see sometimes, you have to constantly keep changing display in order to meet the room your inVerified purchase: YesCondition: Pre-owned
- 27 May, 2020
Speecheless quality for the price
The calculator has almost no scratches, the screen displays all pixels, comes with everything, no engravings, and no wear on the buttons, all for $6. I could not recommend this anymore.
Verified purchase: YesCondition: Pre-owned
- 04 Nov, 2020
The 81, the most straight forward grapher
The 81 is great for your student who is getting their first graphing calc. It is also good for more advanced functions as well. It is simple to use, more straight forward than any other I have used. As I mentioned, it will get you through your trig and basic calculus. There are other more advanced models if you are going further into the sciences - though this one will work - if you take it that far with the 81, it surely will - because you can make it work. If you want the expanded stats/chemistry/etc functions - you will need a little higher model, though if you know your way around the 81, you should be ok.Verified purchase: YesCondition: Pre-owned
- 16 Oct, 2022
works as advertised
The calculator works, the keypad and display are in good condition. Though in my opinion the TI-81 itself (feature wise) is kind of mid.Verified purchase: YesCondition: Pre-owned
- 28 Sep, 2018
Ti-81 is great!
Ti-81s are the best value algebra calculators. If you need to upgrade, try an 86 or 89, which also have great value for their price.Verified purchase: YesCondition: Pre-owned
- 15 Nov, 2018
small problems
I am saying that it is of good quality but there was a partial line out in the display. At least we can use it.Verified purchase: YesCondition: Pre-owned
- 21 Apr, 2016
oldie but goodie
Bought to replace old one with failing display. It is a used unit but 100% operational and clean. Can't beat the $20 price. Of course the screen display technology is old but useable.Verified purchase: YesCondition: Pre-owned
- 20 Dec, 2018
Best Calculator To Get
Still using it a year later! This calculator has lasted me through high school and it will last me through college and then some.Verified purchase: YesCondition: Pre-owned
- 12 Jul, 2023
Great Buy!
Arrived just as described and in a timely manner. I like having historic devices that work.Verified purchase: YesCondition: Pre-owned
