Question about Texas Instruments TI-15 Explorer Calculator

Hello,

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 education.ti.com)**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 0You do that by keying in the number 03. 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]

2

[OP1] [OP1] [OP1 etc.

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

Hope it helps

Posted on Aug 20, 2009

Hi,

a 6ya expert can help you resolve that issue over the phone in a minute or two.

best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.

the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).

click here to download the app (for users in the US for now) and get all the help you need.

goodluck!

Posted on Jan 02, 2017

Use the fraction key [a b/c]

7 5/9 is entered as 7 [a b/c] 5 [a b/c] 9 [=/ ENTER/ EXE]

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...

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 &...

This post is rather exhaustive as regards the matrix capabilities of the calculator. So if the post recalls things you already know, please skip them. Matrix multiplication is at the end.

Let me explain how to create matrices. (If you know how to do it, skip to the operations on matrices, at the end.)

First you must set Matrix calculation

[MODE][6:Matrix]. Then By entering one of the numbers [1:MatA] or [2:Matb] or [3:MatC] you get to choose the dimensions of the matrix

(mxn]. Once finished entering the matrix you clear the screen.

The operations on matrices are available by pressing [Shift][Matrix]

[1:Dim] to change the dimension of a matrix (in fact redefining the matrix)

[2:Data] enter values in a matrix

[3:MatA] access Matrix A

[4:Matb] access Matrix B

[5:MatC] access matrix C

[6:MatAns] access the Answer Matrix (the last matrix calculated)

[7:det] Calculate the determinant of a matrix already defined

[8:Trn] The transpose of a matrix already defined

To add matrices MatA+MatB (MUST have identical dimensions same m and same n, m and n do not have to be the same)

To subtract MatA-MatB. (MUST have identical dimensions, see above)

To multiply MatAxMatB (See below for conditions on dimensions)

To raise a matrix to a power 2 [x2], cube [x3]

To obtain inverse of a SQUARE MatA already defined MatA[x-1]. The key [x-1] is the x to the power -1 key. If the determinant of a matrix is zero, the matrix is singular and its inverse does not exit.

Dimensions of matrices involved in operations must match. Here is a short summary

The multiplication of structured mathematical entities (vectors, complex numbers, matrices, etc.) is different from the multiplication of unstructured (scalar) mathematical entities (regular numbers). As you well know matrix multiplication is not commutative> This has to do with the dimensions.

An**mXn **matrix has** m rows **and**
n columns**. To perform multiplication of an **kXl** matrix by
an **mXn** matrix you multiply each element in one row of the first
matrix by a specific element in a column of the second matrix. This
imposes a condition, namely that the number of columns of the first
matrix be equal to the number of rows of the second.

Thus, to be able to multiply a kXl matrix by am mXn matrix, the number of columns of the first (l) must be equal to the number of rows of the second (m).

So**
MatA(kXl) * MatB(mXn) is possible only if l=m**

MatA(kX3) * Mat(3Xn) is possible and meaningful, but

Mat(kX3) * Mat(nX3) may not be possible.

To get back to your calculation, make sure that the number of columns of the first matrix is equal to the number of rows of the second.** If this condition is not satisfied, the calculator
returns a dimension error**. The order of the matrices in the
multiplication is, shall we say, vital.

Let me explain how to create matrices. (If you know how to do it, skip to the operations on matrices, at the end.)

First you must set Matrix calculation

[MODE][6:Matrix]. Then By entering one of the numbers [1:MatA] or [2:Matb] or [3:MatC] you get to choose the dimensions of the matrix

(mxn]. Once finished entering the matrix you clear the screen.

The operations on matrices are available by pressing [Shift][Matrix]

[1:Dim] to change the dimension of a matrix (in fact redefining the matrix)

[2:Data] enter values in a matrix

[3:MatA] access Matrix A

[4:Matb] access Matrix B

[5:MatC] access matrix C

[6:MatAns] access the Answer Matrix (the last matrix calculated)

[7:det] Calculate the determinant of a matrix already defined

[8:Trn] The transpose of a matrix already defined

To add matrices MatA+MatB (MUST have identical dimensions same m and same n, m and n do not have to be the same)

To subtract MatA-MatB. (MUST have identical dimensions, see above)

To multiply MatAxMatB (See below for conditions on dimensions)

To raise a matrix to a power 2 [x2], cube [x3]

To obtain inverse of a SQUARE MatA already defined MatA[x-1]. The key [x-1] is the x to the power -1 key. If the determinant of a matrix is zero, the matrix is singular and its inverse does not exit.

Dimensions of matrices involved in operations must match. Here is a short summary

The multiplication of structured mathematical entities (vectors, complex numbers, matrices, etc.) is different from the multiplication of unstructured (scalar) mathematical entities (regular numbers). As you well know matrix multiplication is not commutative> This has to do with the dimensions.

An

Thus, to be able to multiply a kXl matrix by am mXn matrix, the number of columns of the first (l) must be equal to the number of rows of the second (m).

So

MatA(kX3) * Mat(3Xn) is possible and meaningful, but

Mat(kX3) * Mat(nX3) may not be possible.

To get back to your calculation, make sure that the number of columns of the first matrix is equal to the number of rows of the second.

Dec 18, 2010 | Casio FX-115ES Scientific Calculator

A fraction is just a particular number.

- Enter numerator of first fraction
- Press the division sign
- Enter the denominator of first fraction
- Press the multiplication key
- Enter second numerator
- Press the division key
- Enter the denominator of second fraction
- If you want a decimal result press [ENTER]
- However, if you want a fraction press [MATH][1:

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

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

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)

Therefore, 64 = n

Sep 18, 2010 | Computers & Internet

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

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

a+0 = a where 0 is the additive identity

For real number a, there exists -a such that

a+(-a) = 0

For real number a,

1 X a = a

where 1 is the multiplicative identity

For real number X where a≠0, there exists 1/asuch that

a X(1/a) = 1

If ab = 0, then a=0 or b=0 or both a and b = 0.

a (b + c ) = ab + ac

(a + b) c = ac+ bc

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

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

[MATH][1:ToFrac].

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.

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

[MATH][1:ToFrac].

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

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.

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

Hello,

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

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

If you want to convert a decimal number into a proper fraction press

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

Hello,

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

[MATH][NUM][5][ENTER]

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

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

[MATH][NUM][5][ENTER]

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

152 people viewed this question

Usually answered in minutes!

×