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IGCSEMathsEdexcelMaths AHigherFlashcardsNumbers & the Number SystemUsing a Calculator

Using a Calculator (Edexcel IGCSE Maths A)

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  • FrontUsing a Calculator

    True of False?

    To find the square of -13, you would type negative 13 squared into your calculator.

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Cards in this collection (6)

  • True of False?

    To find the square of -13, you would type negative 13 squared into your calculator.

    False.

    To find the square of -13, you would type open parentheses negative 13 close parentheses squared into your calculator.

    Your calculator applies the order of operations so it will square before multiplying by -1 unless you use brackets.

  • True or False?

    Typing fraction numerator 2 plus 5 over denominator 3 minus 1 end fractioninto a calculator is the same as 2 plus 5 divided by 3 minus 1.

    False.

    Typing fraction numerator 2 plus 5 over denominator 3 minus 1 end fractioninto a calculator is not the same as 2 plus 5 divided by 3 minus 1.

    Imagine invisible brackets around the numerator and denominator, giving open parentheses 2 plus 5 close parentheses divided by open parentheses 3 minus 1 close parentheses.

  • How do you use a calculator to find the cube root of a number?

    To find the cube root of a number on a calculator, find the button that looks like cube root of blank.

    Be careful, this is different to typing 3 followed by the square root button, 3 square root of blank end root.

  • What does the Ans button on your calculator do?

    The Ans button recalls the last answer the calculator calculated.

    If you have used your calculator to work out a long calculation and then want to square the answer, you can just type Ans2.

  • True or False?

    You should round your answer each time you use your calculator to do a series of calculations in your working.

    False.

    You should only round your answer at the very end of your working, otherwise you may get rounding errors.

    You can show you are not rounding by putting three dots at the end of a number.

    For example:

    sin(20)=0.3420... then 15×0.3420... means you typed in 15×Ans.

  • If your calculator has given you an exact answer (e.g. 2 pi comma space square root of 3 comma space 2 over 7), how do you change it to a decimal?

    To change an exact answer into a decimal, press the straight S left right double arrow straight D button.

    On some calculators, this might be labelled differently such as straight F left right double arrow straight D.

Previous:SurdsNext:Ratio Toolkit

    1. Topic 1

      Number Toolkit

    2. Topic 2

      Set Notation & Venn Diagrams

    3. Topic 3

      Prime Factors, HCF & LCM

    4. Topic 4

      Powers, Roots & Standard Form

    5. Topic 5

      Fractions

    6. Topic 6

      Percentages

    7. Topic 7

      Compound Interest & Depreciation

    8. Topic 8

      Fractions, Decimals & Percentages

    9. Topic 9

      Rounding, Estimation & Bounds

    10. Topic 10

      Surds

    11. Topic 11

      Using a Calculator

    12. Topic 12

      Ratio Toolkit

    13. Topic 13

      Ratio Problem Solving

    14. Topic 14

      Exchange Rates & Best Buys

    15. Topic 15

      Direct & Inverse Proportion

    1. Topic 1

      Algebra Toolkit

    2. Topic 2

      Algebraic Roots & Indices

    3. Topic 3

      Expanding Brackets

    4. Topic 4

      Factorising

    5. Topic 5

      Completing the Square

    6. Topic 6

      Algebraic Fractions

    7. Topic 7

      Rearranging Formulas

    8. Topic 8

      Algebraic Proof

    9. Topic 9

      Solving Linear Equations

    10. Topic 10

      Solving Quadratic Equations

    11. Topic 11

      Solving Inequalities

    12. Topic 12

      Simultaneous Equations

    13. Topic 13

      Forming & Solving Equations

    1. Topic 1

      Sequences

    2. Topic 2

      Functions

    3. Topic 3

      Coordinate Geometry

    4. Topic 4

      Linear Graphs y = mx + c

    5. Topic 5

      Graphs of Functions

    6. Topic 6

      Estimating Gradients

    7. Topic 7

      Real-Life Graphs

    8. Topic 8

      Graphing Inequalities

    9. Topic 9

      Transformations of Graphs

    10. Topic 10

      Differentiation

    1. Topic 1

      Standard & Compound Units

    2. Topic 2

      Angles in Polygons & Parallel Lines

    3. Topic 3

      Bearings, Scale Drawing & Constructions

    4. Topic 4

      Circle Theorems

    5. Topic 5

      Area & Perimeter

    6. Topic 6

      Circles, Arcs & Sectors

    7. Topic 7

      Volume & Surface Area

    8. Topic 8

      Congruence, Similarity & Geometrical Proof

    9. Topic 9

      Area & Volume of Similar Shapes

    10. Topic 10

      Right-Angled Triangles - Pythagoras & Trigonometry

    11. Topic 11

      Sine, Cosine Rule & Area of Triangles

    12. Topic 12

      3D Pythagoras & Trigonometry

    1. Topic 1

      Vectors

    2. Topic 2

      Transformations

    1. Topic 1

      Statistics Toolkit

    2. Topic 2

      Histograms

    3. Topic 3

      Cumulative Frequency Diagrams

    4. Topic 4

      Probability Toolkit

    5. Topic 5

      Probability Diagrams - Venn & Tree Diagrams

    6. Topic 6

      Combined & Conditional Probability