Brainlag PlusWrite very large and very small numbers as A × 10ⁿ, change them back, and compare them.
A × 10ⁿ
Standard form is a number from 1 up to (not including) 10, times a power of 10.
- 4,560,000 = 4.56 × 1,000,000 = 4.56 × 10⁶
- 0.00072 = 7.2 ÷ 10,000 = 7.2 × 10⁻⁴
Big numbers have a positive power; numbers less than 1 have a negative power. The power counts how many places the decimal point moves.
The rest of this lesson and its 7 practice questions are in Plus.
Screen 1 of 2, free to read.
- 7 exam-style questions, marked as you go, each with a worked solution
- Anything you get wrong is saved to your flashcards