Standard Form Summary

Standard form is a way of writing very large, or small, numbers without the bother of writing loads of digits
e.g. 15,700,000,000 can be written 1·57 × 10¹⁰

Numbers less than 1 have a negative power, 10 or more a positive power.

Numbers in standard form are written: A × 10^B where A is a number more than 1 but less than 10 (decimals are allowed) and B is a negative or positive whole number.

The power of ten indicates whether the number is really bigger or smaller, and how many times the decimal point needs to be moved. Negative means move left, positive: right.

Numbers can be easily multiplied or divided in standard form.
Multiplication: multiply the numbers, add the powers.
Division: divide the numbers, subtract the powers.