Texas Instruments MathPrint TI-30X Plus User manual

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©2021 Texas Instruments CL26503.3
TI-30X Plus MathPrint
™
Scientific Calculator
Quick Guide

1
TI-30X Plus MathPrint™ Scientific Calculator Quick Guide
TI-30X Plus MathPrint™ Scientific Calculator Quick Guide.....................................................................1
About this quick guide ............................................................................................................................2
0 Getting started............................................................................................................................2
0.1 Switching the calculator on and off ........................................................................................2
0.2 Display contrast.......................................................................................................................2
0.3 Home screen...........................................................................................................................2
0.4 2nd functions ..........................................................................................................................3
0.5 Modes .....................................................................................................................................3
0.6 Multi-tap keys .........................................................................................................................3
0.7 Menus .....................................................................................................................................4
0.8 Scrolling expressions and history............................................................................................4
0.9 Answer toggle .........................................................................................................................5
0.10 Last answer .............................................................................................................................5
0.11 Order of operations ................................................................................................................6
0.12 Clearing and correcting...........................................................................................................7
0.13 Memory and stored variables.................................................................................................8
1 Basic mathematical functions.....................................................................................................8
1.1 Fractions..................................................................................................................................8
1.2 Percentages.............................................................................................................................9
1.3 Pi (symbol pi).........................................................................................................................10
1.4 Surds......................................................................................................................................10
2 Function table feature ..............................................................................................................11
3 Data editor and list formulas feature .......................................................................................13
4 Stored operations feature.........................................................................................................13
5 Expression evaluation feature ..................................................................................................16
6 Trigonometry ............................................................................................................................17
7 Statistics and probability...........................................................................................................19

2
About this quick guide
This quick guide introduces some of the main features of the TI-30X Plus MathPrint™. In
addition, it provides an overview of display settings, modes and menus, navigation, syntax
and tips for efficient and accurate calculation across NSW Stages 4-6 Mathematics.
0 Getting started
All examples in this quick guide assume the default settings as shown on page 3 (modes).
The TI-30X Plus MathPrint™ can be reset so that all students start at the same point.
To do this, press qfi2.
0.1 Switching the calculator on and off
Press vto turn the TI-30X Plus MathPrint™ on.
Press q◊to turn it off.
0.2 Display contrast
To adjust the contrast:
(1) Press and release the qkey.
(2) Press ≈to darken the screen or press ∫to lighten the screen.
If needed, repeat the above steps to set the desired contrast.
0.3 Home screen
The TI-30X Plus MathPrint™ can display a maximum of 4 lines with a maximum of 16
characters per line.
Keystrokes description:
For entries and expressions longer than
the visible screen area, scroll left and right
(<and >) to view the entire entry or
expression.
Depending on space, the answer is
displayed either directly to the right of the
entry or on the right side of the next line.
Special indicators and cursors may display on the screen to provide additional information
concerning functions or results.
For example:
Indicator
Definition
2ND
2nd function.
SCI,ENG
Scientific or engineering notation.
DEG,RAD,GRAD
Angle mode (degrees, radians or gradians).

3
0.4 2nd functions
Press qto activate the secondary function of a given key.
Example
Use the TI-30X Plus MathPrint™ to calculate
25
.
Keystrokes and solution:
Press q€and enter
25
.
Press n.
25 5=
0.5 Modes
Press to choose modes.
Press ][<>to choose a mode and press nto select it.
Press sor –to return to the home screen and perform your calculations using the
chosen mode settings.
Default mode settings are highlighted in these two sample screens.
MATHPRINT mode displays most inputs and outputs in textbook format.
0.6 Multi-tap keys
A multi-tap key cycles through multiple functions when you press it. Press the key repeatedly
to display the function you wish to enter.
Multi-tap keys include z, f, g, h, u, r, pand d.

4
0.7 Menus
Press >and ]to scroll and select a menu item or press the corresponding number next to
the item. To return to the previous screen without selecting the item, press s. To exit a
menu and return to the home screen, press q–.
Keystrokes description:
For example, press t(key with multiple
menus) to access MATH, NUM, DMS or
R◄►P.
0.8 Scrolling expressions and history
Press or to move the cursor within an expression that you are entering or editing.
Press to move the cursor directly to the beginning of the expression.
Press to move the cursor directly to the end of the expression.
Press [or ]to move the cursor through previous entries in the history. Pressing nfrom
an input or output in history will copy and paste that expression back to the cursor position
on the edit line.
Press q[from the denominator of a fraction in the expressions edit to move the cursor
to the history. Pressing nfrom an input or output in the history will paste that expression
to the denominator.
Example
Press lto calculate the square of a value.
Use the TI-30X Plus MathPrint™ to calculate
(a)
22
17 7−
.
(b)
22
17 7−
, giving your answer in exact form.
Keystrokes and solution:
(a)
Enter
17
and press l-.
Enter
7
and press ln.
22
17 7 240−=
(b)
Press q€[[nn.
22
17 7 4 15−=

5
0.9 Answer toggle
Press cto toggle the display result (when possible) between fraction and decimal
answers, surd and decimal answers and multiples of
π
and decimal answers.
Example
Use the TI-30X Plus MathPrint™ to calculate
4 15
, giving your answer in decimal form.
Keystrokes and solution:
Enter
4 15
(or using the last output from
the previous example).
Press cto toggle between exact form
and decimal form.
4 15 15.49...=
0.10 Last answer
The last entry performed on the home screen is stored to the variable
ans
.
To recall the value of
ans
:
Press qfl(
ans
displays on the screen), or
Press any operation key (+, -etc.) in most edit lines as the first part of an entry.
ans
and the operator are both displayed.
Example
Keystrokes description:
Enter
2
and press *.
Enter
2
and press n.
2 2 4=
Press *and enter
2
.
Press n.
2 2 2 8  =
Enter
3
and press q⁄qfl
n.
32 2 2 2  =

6
0.11 Order of operations
Order of operations hierarchy:
(1st) Expressions inside parentheses.
(2nd) Functions that need a closing
bracket and precede the argument such as
sin, log and all R◄►P menu items.
(3rd) Functions that are entered after the
argument, such as x2and angle unit
modifiers.
(4th) Exponentiation (^) and roots.
In MathPrintTM mode, exponentiation using
the jkey is evaluated from right to left.
For example,
2
3
2
is evaluated as
( )
2
3
2 = 512
.
The TI-30X Plus MathPrint™ evaluates
expressions entered with and ™from
left to right in both Classic and MathPrintTM
modes.
For example, pressing 2llis
calculated as
( )
2
2
2 16=
.
(5th) Negation .
(6th) Fractions.
(7th) Permutations (nPr) and combinations
(nCr).
(8th) Multiplication, implied multiplication,
division and angle indicator

.
(9th) Addition and subtraction.
(10th) Logic operators and, nand.
(11th) Logic operators or, xor, xnor.
(12th) Conversions such as
►n/d◄►Un/d, F◄►D, ►DMS.
(13th) x
(14th) nevaluates the input expression.
Note: In Classic mode, exponentiation using
the jkey is evaluated from left to right. For
example,
2^3^2
is evaluated as
( )
2^3 ^2 = 64
.

7
Example
Use the TI-30X Plus MathPrint™ to calculate
(a)
42 3 14+  −
.
(b)
( )
2
4−
and
2
4−
.
Keystrokes and solution:
(a)
  + −
Enter
42
and press +.
Enter
3
and press *b.
Enter
14
and press n.
42 3 14 0+  − =
(b)
( )
and
−
Press (band enter
4
.
Press )ln.
( )
2
4 16−=
Press band enter
4
.
Press ln.
2
4 16− = −
0.12 Clearing and correcting
Press q–to return the cursor to the home screen.
Press sto clear an error message. It also clears characters on an entry line.
Press eto delete the character at the cursor. When the cursor is at the end of an
expression, it will backspace and delete.
Press q—to insert (rather than replace) a character at the cursor.
Press q≠1to clear variables
, , , , , , ,x y z t a b c d
back to their default values of
0
.

8
0.13 Memory and stored variables
The TI-30X Plus MathPrint™ has eight memory variables,
, , , , , ,x y z t a b c
and
d
.
Press xto store a variable and press zto select the variable to store.
Press nto store the value in the selected variable.
zis a multi-tap key that cycles through the variables
, , , , , ,x y z t a b c
and
d
.
Press to recall and use the stored values for these variables. The variable, say
y
, is
inserted into the current entry and the value assigned to
y
is used to evaluate the
expression.
To recall values of variables, press q≤to display a menu of variables and their stored
values. Select the variable you wish to recall and press n. The value assigned to the
variable is inserted into the current entry and used to evaluate the expression.
Press q≠and select 1: Yes to clear all variable values.
Example
Given that
5x=
and
12y=
, use the TI-30X Plus MathPrint™ to find the value of
22
xy+
.
Keystrokes and solution:
Press q≠to clear variables.
Enter
5
and press xn.
Enter
12
and press xzzn.
Press q≤1l+q≤2l
n.
22
169xy+=
Note: This calculation can also be
performed directly.
1 Basic mathematical functions
1.1 Fractions
In MathPrintTM mode, press k.
Press ]or [to move the cursor between the numerator and denominator.
Fraction results are automatically simplified and the output is in improper fraction form.
Use the ►n/d◄►Un/d conversion (press t1) when a mixed number output is
required.
Press q∂to enter a mixed number. Use the arrow keys to cycle through the unit,
numerator and denominator.

9
Example
Use the TI-30X Plus MathPrint™ to calculate
37
1
4 12
+
.
Give your answer as an improper fraction and as a mixed number.
Keystrokes and solution:
Press kand enter
3
.
Press ]and enter
4
.
Press >+and enter
1
.
Press q∂and enter
7
.
Press ]and enter
12
.
Press n.
3 7 7
1
4 12 3
+=
To give the answer as a mixed number:
Press t1n.
3 7 1
12
4 12 3
+=
Note: Parentheses are added automatically.
If decimal numbers are used or calculated in a fraction’s numerator or denominator, the
result will display as a decimal.
Press q≥when attempting fraction to decimal conversions.
1.2 Percentages
Press q%after entering the value of the percentage.
Example
Use the TI-30X Plus MathPrint™ to calculate
7.5%
of
150
.
Keystrokes and solution:
Enter
7.5
and press q%*.
Enter
150
and press n.
7.5%
of
150
is
11.25

10
1.3 Pi (symbol pi)
To access
π
, press d(multi-tap key).
Example
Use the TI-30X Plus MathPrint™ to find the area of a circle whose radius is
8
cm. Give your
answer correct to one decimal place.
Keystrokes and solution:
Press d*and enter
8
.
Press ln.
This gives
64πA=
.
Press cto convert to a decimal.
201.1A=
(cm2) correct to
1
dec. place.
1.4 Surds
Example
Use the TI-30X Plus MathPrint™ to express
4
2 2 3−
with a rational denominator.
Keystrokes and solution:
Press kand enter
4
.
Press ]and enter
2
.
Press *q€and enter
2
.
Press >-q€and enter
3
.
Press n.
4 4 3 8 2
5
2 2 3
+
=
−

11
2 Function table feature
Press to access the function table.
1: Add/Edit Func
Lets you define the function
( )
fx
or
( )
gx
or both and generates a table of values.
2: f(
Pastes f( to the home screen to evaluate the function at a point (for example,
f(5)
).
3: g(
Pastes g( to the home screen to evaluate the function at a point (for example,
g(2)
).
To set up a function table:
Press 1to select Add/Edit Func. [Press sif required.]
Enter one or two functions as appropriate and press n.
Select the Start, Step, Auto, or
?x=
options and press n.
Press ]and [to move around the function table feature.
Start: Specifies the starting value for the independent variable,
x
. It is set to start at
0
.
Step: Specifies the step value for the independent variable,
x
. The step can be positive or
negative, but cannot be zero. It is set at
1
.
Auto: The TI-30X Plus MathPrint™ automatically generates a series of values for the
dependent variable,
y
, based on the table start and the table step values.
?x=
:Lets you build a table manually for the dependent variable,
y
, by allowing entry of
specific values for the independent variable,
x
.
To display a table, highlight CALC and press n.
In function table view, press sto display and edit the Table Setup wizard as needed.

12
Example
All people attending a party shook hands with each other as a way of exchanging a greeting.
The number of handshakes,
N
, exchanged between
x
people at the party is given by
( ) ( )
1
2
x
N x x=−
where
x+ 
.
(a) Use the TI-30X Plus MathPrint™ function feature to find the number of handshakes
that would be exchanged between
5,10
and
50
people respectively.
(b) Given that
136
handshakes were exchanged, use the TI-30X Plus MathPrint™
function feature to determine how many people at the party shook hands.
Keystrokes and solution:
(a)
Press a1to access the function table.
[If required, press .]
Press kand press zto paste
x
.
Press ]and enter
2
.
Press >*(z-and enter
1
.
Press ]].
Move the cursor to highlight
?x=
and
press n(CALC) n.
Enter
5
and press n.
Enter
10
and press n.
Enter
50
and press n.
With
5
people, there are
10
handshakes.
With
10
people, there are
45
handshakes.
With
50
people, there are
1225
handshakes.
Alternatively, press q–to go to the
home screen.
Press a2and enter
5
.
Press )n. So
( )
f5
is
10
.
Press [to go up and highlight
( )
f5
.
Press n.

13
Change
( )
f5
to
( )
f 10
and press n.
Repeat to change
( )
f 10
to
( )
f 50
.
(b)
From part (a), we conclude that
10x
.
By entering values for
x
, starting with
15
,
for example, the two screenshots show
that
17
people exchanged
136
handshakes.
3 Data editor and list formulas feature
Press yto access the data editor where you can enter data into lists L1, L2 and L3.
When editing a list, press yto access the CLR, FORMULA and OPS menus.
Use <>[]to highlight a cell in the data editor and then enter a value.
Press:
eto delete a cell.
nsto clear the edit line of a cell.
q–to return to the home screen.
to go to the top of a list.
to go to the bottom of a list.
4 Stored operations feature
Press q∑to store an operation and press q∏to paste an operation to the home
screen. To set an operation and then recall it:
Press q∑.
Enter any combination of numbers, operations, and/or data values.
Press nto store the operation.
Press q∏to recall the stored operation and apply it to the last answer or the current
entry.
If you apply q∏directly to a q∏result, a
n =1
iteration counter is incremented.

14
Example
On a particular July day, a weather forecast listed the following predicted maximum
temperatures.
Canberra
13 C
Sydney
18 C
Thredbo
2C
The formula to convert from degrees Celsius to degrees Fahrenheit is given by the function
( )
932
5
F C C=+
.
(a) Convert these temperatures from degrees Celsius to degrees Fahrenheit using the
TI-30X Plus MathPrint™
(i) Data editor and list formulas feature.
(ii) Stored operations feature.
(b) If Katoomba is predicted to have a maximum temperature of
9C
, use the TI-30X
Plus MathPrint™ to convert this temperature to degrees Fahrenheit.
Keystrokes and solution:
(a) (i)
Using the data editor and list formulas
feature:
Press .
Press to clear all lists.
Enter
13
and press ].
Repeat for
18
and
2
.
The three values should now be displayed
in L1.
Press >to scroll across to the top of L2.
Press y>to highlight FORMULA and
press 1.
Now we enter the temperature conversion
formula to L2.
Here we enter
9
5
using the division key to
ensure decimal outputs.
Enter
9
and press /.
Enter
5
and press *.
Press nto paste
L1
into the
author line.

15
Press +and enter
32
.
Press n.
L2 should now display the converted
temperatures
55.4 F,64.4 F
and
35.6 F
.
Note: These temperature conversions
could also be performed using the function
table feature.
(a) (ii)
Using the stored operations feature:
Press q∑.
[If required, press sto clear any
previous stored operations.]
Press *and enter
1.8
.
Press +and enter
32
.
Press n.
Enter
13
q∏.
Enter
18
q∏.
Enter
2
q∏.
The three converted temperatures are
55.4 F,64.4 F
and
35.6 F
.
(b)
Using the data editor and list formulas
feature:
Move to
L1(4) =
, enter
9
and press n.
L2 should now display Katoomba’s
converted temperature of
48.2 F
.
Using the stored operations feature:
Enter
9
q∏.

16
5 Expression evaluation feature
Press q•to input and calculate an expression. Pressing q•from a
populated home screen expression pastes the content to
Expr =
.
If variables
, , , , , ,x y z t a b c
and
d
are used in the expression, you will be prompted for
values or use the stored values displayed for each prompt. The number stored in the
variables will update in TI-30X Plus MathPrint™.
Example
Use the discriminant and the TI-30X Plus MathPrint™ to predict the number and nature of
-x
intercepts for the graph of
2
2 9 5y x x= + −
.
Keystrokes and solution:
Press q•.
[If required, press .]
zis a multi-tap key that cycles through
the variables
, , , , , ,x y z t a b c
and
d
.
Continue to press zuntil
b
appears.
Press l-and enter
4
.
Press *and continue to press zuntil
a
appears.
Press *and continue to press zuntil
c
appears.
Press nsand enter
9
.
Press nsand enter
2
.
Press nsband enter
5
.
Press n.
Substituting
2, 9ab==
and
5c=−
into
24b ac−
gives
( )( )
2
9 4 2 5 121− − =
.
The discriminant is
121
.
Since the discriminant is
2
11
, there are two
rational
-x
intercepts, (
1
5, 2
x=−
).

17
6 Trigonometry
Press wto choose an angle mode from the mode screen. Note that DEG is the default.
Press t>>to display the DMS menu.
Example
Use the TI-30X Plus MathPrint™ in radian mode to convert
45
to radians.
Keystrokes and solution:
Press w>nto be in radian mode.
Enter
45
and press t>>1n.
π
45 4
=
Example
Use the TI-30X Plus MathPrint™ to convert
62.4
to an angle expressed in degrees,
minutes and seconds. (Here angle mode is set to DEG.)
Keystrokes and solution:
Enter
62.4
and press t>>6n.
62.4 62 24
 = 
Note: The default calculation mode is
decimal degrees.

18
Example
The trigonometry keys, f, gand h, are multi-tap keys.
The angle of depression from a drone flying
100
metres above the water to a buoy at sea is
23 18

. Find the horizontal distance from the drone to the buoy. Give your answer correct to
one decimal place.
Keystrokes and solution:
The angle mode is DEG.
100
tan23 18 x

=
and so
100
tan23 18
x=

Enter
100
and press k.
Press hand enter
23
.
Press t>>1and enter
18
.
Press t>>2)n.
The horizontal distance is
232.2
metres,
correct to one decimal place.
Note: Press w]]>>nto set
the decimal notation mode to a one
decimal place output. FIX is displayed as
an indicator at the top of the screen.
Example
Use the TI-30X Plus MathPrint™ to convert
35 25 
to radians. Give your answer
(a) in terms of
π
.
(b) correct to four decimal places.
Keystrokes and solution:
The angle mode is RAD.
[Press w>nto be in radian mode.]
(a)
Enter
35
and press t>>1.
Enter
25
and press t>>2n.
85π
35 25 432

=
(b)
Press cand so
35 25 0.6181

=
(4 dp).

19
Example
Use the TI-30X Plus MathPrint™ to find the exact value of
5π
sin 4
.
Keystrokes and solution:
The angle mode is RAD.
Press fkand enter
5
.
Press *d]and enter
4
.
Press >)n.
5π2
sin 42
=−
.
7 Statistics and probability
Press yto enter and edit lists (see data editor and list formulas feature).
Press q†to access the STAT-REG menu or the DISTR menu.
Example
Two companies, A and B, produce packets of chips which are labelled as having a weight of
50
grams. A random sample of
10
packets is taken from each company. Each packet is
weighed and the results, in grams, are as follows.
Company A:
50.0,50.6,50.0,50.4,49.2,49.0,51.4,50.1,47.4,51.9
Company B:
51.0,50.9,51.1,51.5,51.3,50.2,50.6,50.0,50.5,50.9
(a) For each company’s data, use the TI-30X Plus MathPrint™ to calculate the
(i) mean weight.
(ii) five-number summary.
(iii) interquartile range.
(b) What, if anything, can be concluded about the manufacturing processes of the two
companies?