calculator skills fractions

Jennifer Grabner
5 Sept 201704:35

TLDRThis tutorial focuses on calculator skills for the Casio FX 300ms, used in middle school math classes. It demonstrates how to clear the calculator's memory, enter fractions, simplify them, and convert between mixed numbers, improper fractions, and decimals. The video also covers how to input negative fractions and numbers, and switch between different formats using the fraction and shift buttons.

Takeaways

  • 🔑 To clear the memory on the Casio FX 300ms calculator, use the 'shift' and 'mode' (also 'Clear') buttons, then select option 3 and press 'equals'.
  • 📱 The 'a b / c' button on the calculator is used to enter fractions.
  • ✅ To type a fraction like one-third, input the numerator, press the fraction button, then the denominator.
  • 🔄 Pressing 'equals' after entering a fraction simplifies it if possible.
  • 🔢 The calculator can convert fractions to decimals by pressing the fraction button again.
  • 🎓 To enter a mixed number, type the whole number, press the fraction button, then the numerator and denominator of the fractional part.
  • 🔄 Use the 'shift' and 'fraction' buttons to convert mixed numbers to improper fractions.
  • 🔀 The calculator can switch between decimal, mixed number, and improper fraction displays using the fraction button.
  • ➕ To input a negative fraction, use the negative sign button located on the keypad.
  • 🔁 The calculator can convert negative mixed numbers to decimals or improper fractions using the fraction button.

Q & A

  • What is the purpose of the video?

    -The purpose of the video is to teach middle school students, specifically seventh-graders, how to use a Casio FX 300MS calculator for various calculator skills, with a focus on handling fractions.

  • Which calculator model is featured in the video?

    -The calculator model featured in the video is the Casio FX 300MS.

  • How can you clear the memory on the Casio FX 300MS calculator?

    -To clear the memory on the Casio FX 300MS, press the 'shift' button followed by the 'mode' button, which also serves as the 'Clear' button. Then select option 3 to reset all settings.

  • How do you enter a fraction like one-third on the calculator?

    -To enter one-third, first type '1', then press the fraction button (A B / C), and finally type '3'.

  • What does the calculator do when you press 'equals' after entering a fraction?

    -When you press 'equals' after entering a fraction, the calculator simplifies the fraction if possible.

  • How can you change a fraction to a decimal on the calculator?

    -To change a fraction to a decimal, first display the fraction on the screen, then press the fraction button again.

  • How do you enter a mixed number on the calculator?

    -To enter a mixed number, type the whole number, then press the fraction button followed by the numerator and denominator of the fractional part.

  • What does the 'D over C' button combination do on the calculator?

    -The 'D over C' button combination, accessed by pressing 'shift' and then the fraction button, converts a mixed number to an improper fraction.

  • How do you type a negative fraction on the calculator?

    -To type a negative fraction, use the negative sign button located above the keypad, then enter the fraction as you normally would.

  • What happens when you press the fraction button after entering a negative mixed number?

    -After entering a negative mixed number, pressing the fraction button cycles through different representations: mixed number, decimal, and improper fraction with the negative sign in front.

  • What is the significance of the 'shift' button in the context of the calculator?

    -The 'shift' button is used in combination with other buttons to access additional functions, such as clearing the memory or converting mixed numbers to improper fractions.

Outlines

00:00

📚 Introduction to Casio FX 300MS Calculator

This video segment provides an introduction to the Casio FX 300MS calculator, which is used in middle school West seventh-grade math classes. The presenter demonstrates how to turn on the calculator and clear its memory using the 'shift' and 'mode' buttons. The video also covers how to enter fractions, simplify them, and convert them into decimals or improper fractions using the 'fraction' button. Additionally, the presenter explains how to input mixed numbers and negative fractions, and how to toggle between decimal and improper fraction formats using the 'fraction' button with the 'shift' function.

Mindmap

Keywords

💡Calculator

A calculator is an electronic device used to perform calculations, both basic and complex. In the context of the video, the Casio FX 300MS model is specifically mentioned as the calculator used in class. It is used to demonstrate various mathematical operations such as entering and simplifying fractions, which is the main theme of the video.

💡Shift Button

The shift button on a calculator is used to access secondary functions or modes. In the video, it is shown that pressing shift followed by the mode button allows the user to clear the calculator's memory, which is a necessary step before starting fresh calculations.

💡Mode Button

The mode button on the Casio FX 300MS calculator serves a dual purpose; it is both the mode selection button and the clear button. As explained in the video, pressing shift and then the mode button allows the user to access the clear options, which is crucial for resetting the calculator.

💡Fraction

A fraction represents a part of a whole, expressed as a numerator (top number) divided by a denominator (bottom number). The video focuses on how to enter fractions into the calculator using the 'a/b/c' button, which is essential for performing fraction-related calculations in math classes.

💡Simplify

To simplify a fraction means to express it in its simplest form, where the numerator and denominator have no common factors other than 1. The video demonstrates how to simplify fractions using the calculator by entering the fraction and pressing equals, which is a common task in mathematical problem-solving.

💡Decimal

A decimal is a way of representing fractions using digits after a decimal point. In the video, it is shown that the calculator can convert fractions to decimals by pressing the fraction button, which is useful for comparing or adding fractions with different denominators.

💡Mixed Number

A mixed number is a whole number combined with a fraction. The video explains how to enter mixed numbers into the calculator by first entering the whole number and then using the fraction button to enter the fractional part, which is a practical skill for students learning arithmetic.

💡Improper Fraction

An improper fraction is a fraction where the numerator is greater than or equal to the denominator. The video demonstrates how to convert mixed numbers to improper fractions using the shift and fraction buttons on the calculator, which is an important skill for understanding the relationship between fractions and whole numbers.

💡Negative Fraction

A negative fraction is a fraction that has a negative value. The video shows how to enter negative fractions using the negative sign button on the calculator, which is important for students to understand the concept of negative numbers in the context of fractions.

💡Function

In the context of a calculator, a function refers to a specific operation or feature it can perform. The video highlights various functions of the calculator, such as clearing memory, simplifying fractions, and converting between fractions, decimals, and mixed numbers, which are essential for students to master calculator skills.

Highlights

Introduction to calculator skills for middle school math using Casio FX 300ms.

How to clear the calculator's memory for a fresh start.

Using the shift and mode buttons to access the clear memory function.

Resetting the calculator to its default settings.

Entering fractions into the calculator using the a/b/c button.

Demonstration of entering the fraction one-third.

Simplifying fractions using the calculator's equal button.

Changing the display of fractions to decimals.

Entering mixed numbers and their display on the calculator screen.

Converting mixed numbers to improper fractions using shift and fraction buttons.

Switching between decimal, mixed number, and improper fraction formats.

Entering negative fractions and numbers using the negative sign button.

Displaying and converting negative mixed numbers to decimals and improper fractions.

Practical applications of these calculator skills in math class.

The importance of mastering fraction entry for solving math problems.

Overview of the major skills discussed for working with fractions on the calculator.

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