N(A)-Level Mathematics Practice Questions - Singapore-Cambridge GCE Normal (Academic) Level Mathematics (Syllabus 4045) Exam

Write 0.0045 in standard form.

4.5 × 10^3 4.5 × 10^-3 45 × 10^-4 4.5 × 10^-2

Correct Answer:

4.5 × 10^-3

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