CAIE IGCSE Mathematics E1.8 Standard form Question Bank

Practise calculating with very large or small numbers and giving final answers in correct standard form notation.

Exam points

multiply or divide numbers written with powers of 10, then adjust to a x 10^n form
keep enough significant figures so the standard form answer rounds correctly

[Maximum number: 1]

One year, a farmer makes a profit of $ 24730 selling eggs.

Write this profit

in standard form.
$

$2.473\times10^4$

[Maximum number: 2]

Simplify $1.5\times10^x+1.5\times10^{x-1}$ , giving your answer in standard form.

$1.65\times10^x$
M1 for final answer figures 165 or equivalent working

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