Fractions Using Calculator

Calculator Lesson TI 30

By James Hall

WHAT THIS WILL COVER

​Negative Sign VERSUS Minus Sign

​Exponents and Roots

​

Some text here about the topic of discussion

Fraction to Decimal to Percent

​

​

Simplifying Fractions + Improper Fractions

​

Multiple Choice

KEY BUTTONS on the Calculator

The 2nd button allows you use the abilities listed above each button:

What does it say above the PRB button (written in the same color as the 2nd button)?

• F--D

• INS

• R--P

Multiple Choice

KEY BUTTONS on the Calculator

The 2nd button allows you use the abilities listed above each button:

What does it say above the ON button (written in the same color as the 2nd button)?

• EE

• INS

• OFF

Multiple Choice

Type in Minus 3 and do not hit enter

What does the calculator say?

*** Click on the image if you need to know where the minus sign is

• 3

• Ans-3

• -3

Some text here about the topic of discussion

​Ans - 3

​

This means that the calculator is going to take the last answer and subtract 3​

Multiple Choice

Type in 2

then hit enter

Then type MINUS 3

Hit Enter

What do you get?

• -6

• -1

• 0

Some text here about the topic of discussion

You should have gotten -1

​

The calculator stored the 2 you entered.

Then subtracted 3 to get -1​

Multiple Choice

Now type in Negative Sign 3 and do not hit enter

What does the calculator say?

**** Click on the image if you need to see where the negative sign is

• 3

• Ans-3

• -3

Some text here about the topic of discussion

-3

​

This means that the calculator knows we want to input Negative Three​

Minus Sign VS

Negative Sign

Some text here about the topic of discussion

​Unfortunately there is an error in the calculators that confuses the difference between minus and a negative sign.

So... 1) Use Minus between numbers

2) Use the negative sign if you are ​putting a negative number in (parentheses) or starting with a negative number

Fill in the Blank

Type in NEGATIVE 3 MINUS 3

**Use no spaces in your answer

Fill in the Blank

Type in NEGATIVE 5 MINUS 2

**Use no spaces in your answer

Fill in the Blank

Type in 3 MINUS (-3)

**Use no spaces in your answer

*** Parentheses are highlighted in the picture

Fill in the Blank

Type in 2 MINUS (-7)

**Use no spaces in your answer

*** Parentheses are highlighted in the picture

the calculator will simplify fractions for you.

​

Just type the 1) numerator

2) Ab/c button 3) denominator 4) Enter​

​Some text here about the topic of discussion.

Simplifying Fractions

​

Fill in the Blank

Try to simplify 18 / 54.

***Hint type into the calculator:

1) 18 2) Ab/c button

3) 54 4) Enter

5) Type your answer with no spaces using the backslash sign on the keyboard as it shows on the calculator

Fill in the Blank

Try to simplify 20160/ 100800

***Hint type into the calculator:

1) 20160 2) Ab/c button

3) 100800 4) Enter

5) Type your answer with no spaces using the backslash sign on the keyboard as it shows on the calculator

Fill in the Blank

Try to simplify 616 / 3696

Fill in the Blank

Try to simplify 36 / 72

Fill in the Blank

Try to simplify 11/ 16

Multiple Choice

What was different about the last answer?

• The fraction did not change

• The fraction changed

If the fraction is already in simplest form, the calculator will not change it

​

Another example: Simplify ​ 7/11

​

Some text here about the topic of discussion

Multiple Select

Try to simplify 27/ 18

• 1 u 1/2

• 1 1/2

• 11/2

• 1 and 1/2

• 101/2

1 u 1/2 is a mixed fraction

​

Another example: Simplify ​ 48/36

​

Some text here about the topic of discussion

the calculator will switch between types of fractions for you.

​

Just type the 1) the Number

2) x^2 button​

​Some text here about the topic of discussion.

Mixed Fraction to Improper Fraction

​

Fill in the Blank

Type in

1) 1 2) Ab/c button 3) 1

4) Ab/c button 5) 2

now type

6) 2nd 7) Ab/c

What fraction do you get with no spaces?

Fill in the Blank

Simplify 1512 / 1008

Then convert it to an improper fraction

2nd button then Ab/c button

Fill in the Blank

Simplify 120 / 105

Then convert it to an improper fraction

2nd button then Ab/c button

** No spaces in the answer

Fill in the Blank

Simplify 84 / 54

Then convert it to an improper fraction

** No spaces in the answer

Fill in the Blank

Simplify 116 / 88

Then convert it to an improper fraction

** No spaces in the answer

the calculator will switch between Fractions and Decimals for you

​

Just type the 1) fraction using the Ab/c Button

2) 2nd Button

3) PRB Button

​Some text here about the topic of discussion.

Fraction -- Decimal

​

Multiple Choice

Enter 5 / 9

Then convert it to a decimal

1) Enter 5/9 Using the Ab/c Button

2) Hit 2nd 3) Hit PRB

Which is the closest to the calculator?

• 0.33333333

• 0.44444444

• 0.555555556

Multiple Choice

Enter 2 / 7

Then convert it to a decimal

1) Enter 2/7 Using the Ab/c Button

2) Hit 2nd 3) Hit PRB

Which is the closest to the calculator?

• 0.428571429

• 0.285714286

• 0.142857143

Multiple Choice

Enter 3 / 11

Then convert it to a decimal

Which is the closest to the calculator?

• 0.2727272727

• 0.454545454545

• 0.818181818181

the calculator will square a number, and find the square root of a number

​

Just type the 1) fraction using the Ab/c Button

2) 2nd Button

3) PRB Button

​Some text here about the topic of discussion.

Squares & Square Roots

​

Multiple Choice

Find 3^2

• 6

• 9

• 0.818181818181

WHAT THIS WILL COVER

Carat symbol and Higher powers and roots

Parentheses

​

​

Some text here about the topic of discussion

Rounding

​

​

Arrows

​

​

WHAT THIS WILL COVER

Probability notation?

e^x ln?

​

Some text here about the topic of discussion

sin cos tan

​

​

sci/eng mode

​

​

syntax errors

​

​

​