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Edexcel IGCSE Math A 2.2.A Evaluating Expressions by Substitution

Practise replacing letters with numerical values and following operations, powers and number-machine steps in the correct order.

Syllabus
First assessment 2018
Course
Math A 4MA1
Level
Foundation

Exam points

  • substitute a negative value in brackets before evaluating a power
  • follow each number-machine operation in sequence from input to output

2.2.A Evaluate expressions by substituting numerical values question 1

[Maximum number: 1]

Here is a number machine.

Figure for Question 2.2.A Evaluate expressions by substituting numerical values question 1 — Edexcel IGCSE Math A Foundation

Work out the output when the input is 8

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