Educational Insights See & Solve Fraction Calculator User manual

Brand
Educational Insights
Model
See & Solve Fraction Calculator
Type
User manual

This manual is also suitable for

EI-8479
Ages 7+
Grades 2+
See ‘N’ Solve
Fraction Calculator
See ‘N’ Solve
Fraction Calculator
Using Your See ‘N’ Solve Fraction Calculator
This unique calculator is not only easy to use, but it shows you step-by-step how
a problem is solved. By pressing the Numerator and Denominator keys, you can
quickly input a fraction problem. The large screen displays the problem and the
steps to solve it.
Your See ‘N’ Solve Fraction Calculator has two lines of display.
TOP LINE
Displays the problem as it is entered.
BOTTOM LINE (left)
Displays steps to solve the problem.
BOTTOM LINE (right)
Displays the answer.
Figure 1
2
Features
Numerator Key
Press before entering the
numerator of a fraction.
Denominator Key
Press before entering
the denominator of a
fraction.
Improper to Mixed Key
Press to see an improper
fraction converted to
a mixed number OR a
mixed number converted
to an improper fraction.
This key lights up when
active.
Simplify Key
Press to see a fraction
reduced to lowest terms.
The greatest common
factor is also displayed.
This key lights up when
active.
Decimal Key
Press to enter a
decimal point. This
key is only active
in STANDARD
calculator mode.
Step Key
Press to see the steps
in solving a problem.
This key lights up
when active.
Fraction to Decimal to
Percent Key
Press once to convert a
fraction to a decimal.
Press again to convert the
decimal to a percentage.
Clear Key
When entering a
calculation, press once
to clear the last entry or
twice to clear the screen.
After completing a
calculation, press once to
clear the screen.
Enter Key
Press to see the final answer.
Operation Keys
Mode Switch
Slide to switch from
FRACTION to STANDARD
modes.
Entering FRACTION Calculations
Before You Begin:
Press the ON/OFF button.
•
Slide the Mode Switch to FRACTION. This switch is on the side of the calculator.•
How to Enter a Fraction:
1. To input the numerator, press the
button
followed by the number.
2. To input the denominator, press the
button
followed by the number.
How to Enter a Mixed Number:
1. To input the whole number, press the number
button(s).
2. To input the numerator, press the
button
followed by the number.
3. To input the denominator, press the
button
followed by the number.
If you enter a wrong number by mistake, press the
key once to clear the
last entry. If you wish to start over before finishing a calculation, press the
key twice.
Showing the Answer
Press to immediately see the answer, reduced to its lowest terms.
Press
to see a step-by-step solution to the problem.
To solve a new problem after completing a calculation, press
once to clear
the screen.
Figure 2
Figure 3
3
STEP Key
The key allows you to see the step-by-step solution to a fraction problem.
In showing the steps of a problem, the calculator will first convert any mixed
numbers to improper fractions. At the end of the problem, the calculator will simplify
the answer to lowest terms and then convert an improper fraction back to a mixed
number.
Input problem.
Press
.
TOP LINE....................... Input problem displayed
BOTTOM LINE (left)….. Mixed numbers converted to
improper fractions
BOTTOM LINE (right)... Sum of improper fractions
Press
again.
TOP LINE....................... Answer from bottom line (right)
of previous screen
BOTTOM LINE (left)….. Greatest common factor (GCF)
of fraction from top line
BOTTOM LINE (right)... Simplified form of fraction from
top line
Press
a third time.
TOP LINE....................... Answer from bottom line (right)
of previous screen
BOTTOM LINE (left)….. Improper fraction from top line is
divided
BOTTOM LINE (right)... Final mixed number answer
A flashing arrow appears on the screen if there is not enough space to display
both the step and the result of that step on the bottom line of the screen.
When there is a flashing arrow, only the step is displayed. Press
to continue.
Figure 4
Figure 5
Figure 6
Figure 7
4
ENTER Key
To jump directly to the final answer (rather than see the steps to the solution), press
the
key after inputting a problem.
Input problem.
Press
.
TOP LINE....................... Input problem displayed
BOTTOM LINE (left)….. Displays first step: Mixed numbers
converted to improper fractions
BOTTOM LINE (right)... Final mixed number answer
SIMPLIFY Key
Reduce a fraction to lowest terms with the key. If the light on the key
lights up, the fraction can be reduced.
Input a fraction to be reduced.
The light on the key lights up.
Press
.
TOP LINE....................... Input fraction displayed
BOTTOM LINE (left)….. Greatest common factor (GCF) of
input fraction
BOTTOM LINE (right)... Simplified form of input fraction
Figure 8
Figure 9
Figure 10
Figure 11
5
IMP MIX Key
Convert an improper fraction to a mixed number OR convert a mixed number to an
improper fraction with the
key. If the light on the key lights up, the
fraction can be converted.
Input an improper fraction to be converted to a mixed
number.
The light on the
key lights up.
Press
.
TOP LINE....................... Input fraction displayed
BOTTOM LINE (left)….. Improper fraction from top line
is divided
BOTTOM LINE (right)... Mixed number answer
Alternatively, enter a mixed number and press the
key to convert it to an
improper fraction.
Input a mixed number to be converted to an improper
fraction.
The light on the
key lights up.
Press
.
TOP LINE....................... Input fraction displayed
BOTTOM LINE (left)….. Work is shown in the following
format:
whole number x denominator + numerator
denominator
BOTTOM LINE (right)... Improper fraction answer
More than one key lit? If more than one key is lit, press any lit key to continue.
Figure 12
Figure 13
Figure 14
Figure 15
6
F D % Key
Convert a fraction to a decimal and then to a percent using the key.
Input a fraction to be converted to a decimal and
a percent.
Press
.
TOP LINE....................... Input fraction displayed
BOTTOM LINE (left)….. Numerator
÷ denominator
BOTTOM LINE (right)... Decimal answer
Press again to see decimal answer converted to a percent.
TOP LINE....................... Decimal answer (from bottom
right of previous screen)
displayed with ‘x 100’ to show
how to convert the decimal to
a percent
BOTTOM LINE (left)….. Blank
BOTTOM LINE (right)... Percent answer
(result of multiplication from top line)
If a mixed number or a whole number is input, it will first be converted to an
improper fraction before being converted to a decimal. This will require a press of
the
key after inputting the problem.
The calculator does not round answers. When an answer contains more decimal
places than will fit on that line of the screen, any additional places will be left off
(truncated).
Once the
key is pressed, all other calculator keys are disabled except the
key, key, and key. To reactivate these keys, start over with a
new calculation.
Figure 16
Figure 17
Figure 18
7
Working with More than Two Fractions (Subtotaling)
If you want to perform an operation with more than two fractions, the calculator will
subtotal the first two fractions and place the result in the top left of the screen.
Input two fractions to be subtotaled and then press
another operation key (in this example, the key).
TOP LINE.... The subtotal of the first two fractions is
displayed as well as the second operation
symbol that was pressed. You can now
continue adding, subtracting, multiplying,
or dividing.
Figure 19
Figure 20
8
Dividing Whole Numbers (Non-fractions)
in the Fraction Calculator Mode
The calculator will first show whole number division as a fraction before solving the
problem.
Input two whole numbers to be divided.
Press
.
TOP LINE...................... Input division problem displayed
BOTTOM LINE (left)….
Dividend
Divisor
BOTTOM LINE (right).. Blank
Press
again.
TOP LINE......................
Dividend
from bottom line (left)
Divisor
of previous screen
BOTTOM LINE (left)…. Greatest common factor (GCF) of
input fraction
BOTTOM LINE (right).. Answer to division problem
Figure 21
Figure 22
Figure 23
9
Error Messages
When the answer (or one of the steps) is too long to be displayed, an E (error)
appears on the screen.
You cannot input a fraction with a denominator of zero. You cannot divide a number
by zero using the
÷ key. If attempted, the calculator will display the following error
message:
÷0E.
If an error message is displayed, press
once to clear the screen and start over.
Standard Calculator Mode
This calculator can be used as a standard calculator. To switch to this mode, slide the
Mode Switch on the side of the calculator to STANDARD. In this mode, the
key
is active. The following keys are disabled in STANDARD mode:
, , ,
, , and .
Sleep Mode
To conserve batteries, the See ‘N’ Solve Fraction Calculator will turn off after five
minutes of inactivity.
Cleaning
Clean with a damp or dry cloth. Do not immerse the See ‘N’ Solve Fraction Calculator
in water. Do not spray any liquid or water on it.
10
Glossary of Fraction Terms Used in This Guide
denominator — the number on the bottom of the fraction line (for example, in ,
5 is the denominator)
dividend — number to be divided (for example, in 10
÷ 2, 10 is the dividend)
divisor — a number by which another number is to be divided (for example,
in 10
÷ 2, 2 is the divisor)
greatest common factor (GCF) — the greatest number that is a factor of both the
numerator and denominator in a fraction (for example, in
, 4 is the GCF)
improper fraction — a fraction in which the numerator is greater than or equal to
the denominator (for example,
)
lowest terms — refers to a fraction in which the GCF of the numerator and
denominator is 1
mixed number — a number written as a combination of a whole number and a
fraction (for example,
)
numerator — the number on the top of the fraction line (for example, in
, 3 is the
numerator)
reduce — see simplify
simplify — to divide both the numerator and denominator by a common factor;
the resulting fraction has been simplified to lowest terms if the numerator and
denominator were divided by the GCF
(for example,
4
÷
4
=
1
)
8
4 2
whole number — a number without fractions (for example, 3)
11
Developed in Southern California by Educational Insights.
© Educational Insights, Inc., Gardena, CA (U.S.A.). All rights reserved. Learning
Resources Ltd., King’s Lynn, Norfolk (U.K.). Please retain this information.
Made in China.
www.Educational
Insights.com
Fabriqué en Chine. Informations à conserver.
Made in China. Bitte bewahren Sie unsere
Adresse für spätere Nachfragen auf.
Hecho en China. Conservar estos datos.
Battery Installation Instructions
For the best operation, always use fresh alkaline batteries. Other battery types will
have a shorter life.
Carefully open the battery compartment door (located 1.
on the bottom of the unit) by using a dime or
screwdriver to remove the screw from the battery
compartment.
Install two fresh AA-cell batteries in the battery 2.
compartment, following the diagram showing correct
battery installation.
Do not use rechargeable batteries.
•
Do not mix old and new batteries.•
Do not mix different types of batteries: alkaline, •
standard (carbon zinc) or rechargeable (nickel-
cadmium) batteries.
Non-rechargeable batteries are not to be recharged.
•
Rechargeable batteries are to be removed from the •
unit before being charged.
Rechargeable batteries are only to be charged under
•
adult supervision.
Only batteries of the same or equivalent type as
•
recommended are to be used.
Batteries are to be inserted with the correct polarity.
•
Exhausted batteries are to be removed from the unit.•
The supply terminals are not to be short-circuited.•
To prevent corrosion and possible damage to the product, it is recommended •
to remove the batteries from the unit if it will not be used for more than
two weeks.
Close the battery compartment door and tighten the screw.3.
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Educational Insights See & Solve Fraction Calculator User manual

Brand
Educational Insights
Model
See & Solve Fraction Calculator
Type
User manual
This manual is also suitable for
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