Brainlag PlusMultiply, divide, add and subtract in standard form without a calculator, and solve problems about space, cells and data.
Multiplying and dividing
Multiply (or divide) the numbers in front, then use the index laws on the powers of 10.
Then make sure the answer is in standard form.
- (4 × 10⁵) × (6 × 10³) = 24 × 10⁸
- = 2.4 × 10⁹
- (3 × 10⁴) ÷ (6 × 10⁻²) = 0.5 × 10⁶ = 5 × 10⁵
The rest of this lesson and its 7 practice questions are in Plus.
Screen 1 of 3, free to read.
- 7 exam-style questions, marked as you go, each with a worked solution
- The Scientific Calculator beside every question
- Anything you get wrong is saved to your flashcards