Year 9 - Maths
Using the fx-83/85GT CW for number
Calculator functionality
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This pupil-friendly study guide includes a unit summary, clear notes, common mistakes, and quick questions with answers.
Unit Summary
This unit teaches how to use scientific calculators and expores their functionality
Lesson Summary
You will learn to use the fx-83/85GT CW to perform calculations with numbers.
Key Notes
- Some calculators can perform more than just basic calculations.
- The fx-83/85GT CW can convert between different formats for values.
- The fx-83/85GT CW can quickly calculate the LCM or HCF for a pair of positive integers.
Vocabulary To Learn
- Factor: A factor is a term which exactly divides another term.
- Prime factors: Prime factors are the factors of a number that are, themselves, prime.
- Lowest common multiple (LCM): The lowest common multiple is the lowest number that is a multiple of two or more numbers.
- Highest common factor (HCF): The highest common factor of two or more integers which can be divided by all other possible common factors.
- Recurring decimal: A recurring decimal is one that has an infinite number of digits after the decimal point.
Common Mistakes To Avoid
- Calculators can only be used to add, subtract, multiply or divide.
3 Quick Questions (With Answers)
1. Solve this in steps: explain the method from this lesson and why each step matters.
Some calculators can perform more than just basic calculations. The fx-83/85GT CW can convert between different formats for values.
2. Use this key word in a maths sentence and explain it clearly. 'Factor'
A factor is a term which exactly divides another term. Use this word when showing your method, then check your final answer is reasonable.
3. Spot and fix this common maths mistake.
Mistake: Calculators can only be used to add, subtract, multiply or divide. Correction: They can be used to perform basic calculations but they can also do so much more.
More Lessons In This Unit
Browse all guides in the Year 9 Maths guide library.