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Learning objective

Utilize a calculator effectively by avoiding rounding intermediate values and only rounding the final result. Input values correctly into the calculator, such as converting 2 hours 30 minutes to 2.5 hours or 2° 30’ 0’’. Understand the calculator's display, interpreting 4.8 as $4.80 in monetary terms and 3.25 as 3 hours 15 minutes in time.

Read the explanation, check the common trap, then practise with flashcards and questions.

Exam focus

  • Read the explanation.
  • Check key terms.
  • Practise with linked questions.
Cambridge IGCSE MathematicsCore Number

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Quick explanation

Utilize a calculator effectively by avoiding rounding intermediate values and only rounding the final result. Input values correctly into the calculator, such as converting 2 hours 30 minutes to 2.5 hours or 2° 30’ 0’’. Understand the calculator's display, interpreting 4.8 as $4.80 in monetary terms and 3.25 as 3 hours 15 minutes in time

  • This point belongs to Using a calculator, especially Using a calculator outcomes.
  • You need to be able to utilize a calculator effectively by avoiding rounding intermediate values and only rounding the final result. Input values correctly into the calculator, such as converting 2 hours 30 minutes to 2.5 hours or 2° 30’ 0’’. Understand the calculator's display, interpreting 4.8 as $4.80 in monetary terms and 3.25 as 3 hours 15 minutes in time.
  • The key ideas to know are Calculate, Determine, and Show.
  • Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.

Key concepts

CalculateDetermineShowExplain

Why it matters

This objective helps connect Using a calculator outcomes to exam-style questions, flashcards, and revision notes for Using a calculator.

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Paper 2 structured question: Using a calculator

Paper 2Core or Extended Mathematics1 marks

Description

Time Conversion

Convert the following time into hours for calculation: 3 hours 45 minutes.

  1. a

    Calculate Convert 3 hours 45 minutes into hours.

    Aim for approximately 1 distinct marking point.

    [1]
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