Write in standard form.
Answer and explanation
Correct answer: C.
- Step 1: Move the decimal point to just after the first non-zero digit: 4.5.
- Step 2: The point moved 5 places to the right, so the power of ten is -5.
Answer
.
Why not the others: moves the point only 4 places, is not in standard form because 45 is greater than 10, and has the wrong sign for a small number.
Practise more Number, Surds, Indices and Bounds.
Free questions with an explanation for every one, and full timed UK GCSE mock tests.