Question about Texas Instruments TI-15 Explorer Calculator

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Multiples On the old math explorers we could get multiples just by entering  + (a number) = =  = = = like + 6 = and get 6, 12, 18, 24, 36...... On the TI15, we can't figure out how to do this.  We really need to be able to get lists of multiples for our new math program. We just purchased 100 of the calculators for our fifth grades, so any help would be appreciated.

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You can still that on the TI 15 explorer (look for constant calculations page 57 in your user manual or maybe the teacher's guide that you can download from

1. First you define the operation you want to perform, using the OP1 key as follows
[OP1] [+] [6] [OP1] this sequence stores the operation you intend tu use repeatedly.
2. Since you want multiples you must start the sequence with 0
You do that by keying in the number 0
3. Press [OP1] repeatedly.

Each time you press [OP1] a counter shown on the lower left corner of the screen increases its value by 1, and the result (on the lower right corner) shows you the next multiple.

If you just want to add the same number repeatedly starting from some chosen number, in step 2 above use any number but zero.

[OP1] [+] [6] [OP1]
[OP1] [OP1] [OP1 etc.
will generate the numbers 2+6=8, 14, 20 etc.

Hope it helps

Posted on Aug 20, 2009

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How do I enter a mixed number?

Use the fraction key [a b/c]
7 5/9 is entered as 7 [a b/c] 5 [a b/c] 9 [=/ ENTER/ EXE]

Sep 30, 2014 | Texas Instruments TI-15 Explorer...

1 Answer


Both numbers are multiple of 100 (the two zeros at the end). Divide both numbers by 100 (remove two zeros from each). You are left with 20/6. Now divide each number by 2 to get 10/3. Use the technique you learned to calculate the result.

Feb 06, 2014 | The Learning Company Achieve! Math &...

1 Answer

How do you put in a fraction to mulitiply it by another fraction?

A fraction is just a particular number.
  1. Enter numerator of first fraction
  2. Press the division sign
  3. Enter the denominator of first fraction
  4. Press the multiplication key
  5. Enter second numerator
  6. Press the division key
  7. Enter the denominator of second fraction
  8. If you want a decimal result press [ENTER]
  9. However, if you want a fraction press [MATH][1:

Sep 21, 2010 | Texas Instruments TI-83 Plus Calculator

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I have a very strange math teacher that collects old math books.One day i asked him how many old math books he has.Being a math teacher, he responded, "if i divide the books into two unequal whole...

Your teacher has 64 old math books.
Define the variables:
n = the total number of books x + y = the number of books divided into two groups (x being one set of books and y the other)
Equation set-up from the problem:
64(x - y) = x^2 - y^2
Work it out:
64(x - y) = (x + y)(x - y)
64(x - y) = (x + y)(x - y) (x - y) (x - y)
64 = (x + y)
Therefore, 64 = n

Sep 18, 2010 | Computers & Internet

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Hii,here is list of basic real numbers properties applying them you can solve the problems easily.

Assuming a,b,c,d are real numbers:

1)Commutative Property
a) Property of Addition: a+b = b+a
b)Property of Multiplication: ab = ba

2)Associative Property
a)Property of Addition: (a+b) + c = a + (b + c)
b)Property of Multiplication: ( ab )c = a ( bc )

3)Additive Identity:
a+0 = a where 0 is the additive identity
4)Additive Inverse:
For real number a, there exists -a such that
a+(-a) = 0
5)Multiplicative Identity:
For real number a,
1 X a = a
where 1 is the multiplicative identity
6)Multiplicative Inverse:
For real number X where a≠0, there exists 1/asuch that
a X(1/a) = 1
7)Zero Product Law:
If ab = 0, then a=0 or b=0 or both a and b = 0.

8)Distributive Properties:
a)Left distributive law
a (b + c ) = ab + ac
b)Right distributive law
(a + b) c = ac+ bc

Jun 09, 2010 | Vivendi Excel@ Mathematics Study Skills...

1 Answer

How do i do fractions with this calculator? there are so many keys i dont know what to push.

The primary key to enter something that resembles a fraction is the division key, the one above the multiplication key.
However, any division you enter yields a decimal number, unless the result is an integer.

To keep the result of a division as a (reduced) fraction use the [|=>Frac] or [ToFrac] command. It is accessible by the following key sequence
Insert it after the fraction, before pressing the [ENTER] key to get the result.

By pressing [MATH][2:ToDec] you convert a fraction in to a decimal number.

Apr 10, 2010 | Texas Instruments TI-83 Plus Calculator

1 Answer

I can't find this button on my calculator / this

A fraction is in fact a ratio of two number: a division of a numerator by a denominator. The key used for the division operation is the one above the multiplication sign and below the caret [^], and in thee rightmost column of keys.

Beware that this calculator converts any ratio of two numbers into a decimal value. To keep a fraction in a fraction form you must use the [|=>Frac] or [ToFrac] command. To convert a decimal result to a fraction, use the [|=>Dec] command.
These commands are accessible through the CATALOG or more easily by pressing [MATH] (under the ALPHA key) and selecting [1:|=>Frac], or [2:|=>Dec]
Ex: to keep 27/48 in fraction form you enter
27 [/] 48 [MATH][1:|=>Frac] [ENTER]. Result is 9/16
You will notice that the resulting fraction is reduced to its simplest form.
To convert the above result from fraction to decimal press [MATH][2:|=>Dec]

A fraction can always be approximated by a decimal value but the converse is not always possible.

Jan 23, 2010 | Texas Instruments TI-84 Plus Calculator

1 Answer

I want to know how to key in to calculate 2 to the twelveth power to get anser.

You should specify your calculator and avoid posting the same question multiple times.)
Here is the solution for FX-300ES

Between the x`squared key and the log key there is a key with an x with a raised small figure of a solid square. That is the key you use to enter arbitrary exponents.
  1. If calculator is in MathIO ( a Math indicator appears on the upper band of the screen), enter the base of the power (here 2). A number 2 with a raised empty square appears.The cursor will blink in the raised square. Enter there the exponent (here 12) and press [=]. Result 4096 appears at the bottom of the screen.
  2. If in LineIO (no Math indicator appears on the narrow band at the top of the screen), press 2 and then the key I talked about above. On the screen a number 2 appears with a hat and a left parenthesis. Type in the exponent (here 12) , the right parenthesis and press [=]. The calculator should display 4096.000...
Hope it helps

Nov 17, 2009 | Office Equipment & Supplies

1 Answer

Where is the fraction button on the ti 83 plus cac. look like

There is no fraction button. Any division of two integers you do is represented as a decimal number. If you want your fraction to remain a fraction you enter it as follows
7[ / ] 19 [ MATH][1:ToFrac] [=] displays 7/19
If you want to convert a decimal number into a proper fraction press [MATH][1:ToFrac] .
Exemple 7/19 [ENTER] gives .36842105. If without doing anything else, you press [MATH][1:ToFrac] you recover 7/19.
There are limitations related to the number of decimal digits in the floating point number.
.3684 [MATH][1:ToFrac][=] gives 921/2500 but
.36842 [MATH][1:ToFrac][=] gives .36842 : it is not converted to fraction.

Hope it helps

Sep 16, 2009 | Texas Instruments TI-83 Plus Calculator

1 Answer


There is no such button, but there is a command accsssible as follows
[MATH] right arrow to highlight [NUM] and 5:int( [ENTER] In short
The command appears on home screen, where you give it the decimal number whose inter part you want.
Ex; int(15.87) gives 15

You shoul explore the catalog of all commands avaible on your calculator. You press [2nd][CATALOG] (under the digit 0) and scroll down or up. If you know the command, while in [catalog] press [ALPHA] and enter the first letter of the command. The cursor moves to the first occurrence of the letter and you can then scroll more to reach the command.

Hope it helps

Jun 04, 2009 | Texas Instruments TI-84 Plus Calculator

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