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Edexcel IGCSE Math A Higher 1.9 Standard Form Questions

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

Question 1

[Maximum number: 4]

Question (a)

(a)

Write 6.04×1056.04 \times 10^{5} as an ordinary number.

[ 1 ]

Question (b)

(b)

Write 0.00007 in standard form.

[ 1 ]

Question (c)

(c)

Work out 7.6×10104×105−2×104\frac{7.6 \times 10^{10}}{4 \times 10^{5}-2 \times 10^{4}}

Give your answer in standard form.

[ 2 ]

Question 2

[Maximum number: 3]

The table shows information about the surface area of each of the world's oceans.

Table for Question 2 — Edexcel IGCSE Math A Higher

Question (a)

(a)

Work out the difference, in square kilometres, between the surface area of the Atlantic Ocean and the surface area of the Indian Ocean.
Give your answer in standard form.
square kilometres (2)

The surface area of the Pacific Ocean is k times the surface area of the Arctic Ocean.

[ 2 ]

Question (b)

(b)

Work out the value of k.

Give your answer correct to the nearest whole number.

k=
[ 1 ]

Question 3

[Maximum number: 1]

9N=480×1099 \quad N=480 \times 10^{9}

Write N as a number in standard form.

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