Year 9 - Maths
Using the fx-991CW for number and algebra
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-991CW to perform calculations with numbers and solve equations numerically.
Key Notes
- Some calculators can perform more than just basic calculations.
- The fx-991CW can convert between different formats for values.
- The fx-991CW can solve equations numerically.
Vocabulary To Learn
- Prime factor: Prime factors are the factors of a number that are, themselves, prime.
- Equation: An equation is used to show 2 expressions that are equal to each other.
- Simultaneous equations: Equations which represent different relationships between the same variables are called simultaneous equations.
- Inequality: An inequality is used to show that one expression may not be equal to another.
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-991CW can convert between different formats for values.
2. Use this key word in a maths sentence and explain it clearly. 'Prime factor'
Prime factors are the factors of a number that are, themselves, prime. 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.