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Edexcel IGCSE Math A 1.9 standard form

Use standard-form questions to convert ordinary numbers, calculate with powers of 10 and keep final answers in correct form.

Syllabus
First assessment 2018
Course
Math A 4MA1
Level
Higher

Exam points

  • Convert ordinary numbers and standard-form values in both directions accurately.
  • Calculate with powers of 10, then rewrite the answer so the coefficient is 1 ≤ a < 10.
  • Interpret contextual standard-form comparisons involving large or small quantities.

Covered syllabus points

1.9.A Standard form1.9.HA Problems involving standard form

1.9 Standard form question 1

[Maximum number: 1]

9N=480×1099 \quad N=480 \times 10^{9}

Write N as a number in standard form.

1.9 Standard form question 2

[Maximum number: 4]

The table gives information about the population, correct to 2 significant figures, of each of five cities in 2018

Table for Question 1.9 Standard form question 2 — Edexcel IGCSE Math A Higher

Question (a)

(a)

Write 8.8×1068.8 \times 10^{6} as an ordinary number.

[ 1 ]

Question (b)

(b)

Which of these cities had the least population in 2018 ?

[ 1 ]

Question (c)

(c)

Work out the difference between the population of Tokyo and the population of Ahmedabad in 2018
Give your answer in standard form correct to 2 significant figures.

[ 2 ]
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