Index Form

Standard Form (sometimes called Standard Index Form) is a way of writing very big and very small numbers using powers of 10

Example:

Using standard Form numbers are always written in the form:

 $1\le a\le10$  so there is one non-zero digit before the decimal point

 $n>0$  for LARGE numbers - how many times  $a$  is multiplied by 10

 $n<0$  for LARGE numbers - how many times  $a$  is divided by 10

Do calculations on calculator (if allowed). Otherwise follow rules (including indices) but adjust answer to fit Standard Form (move decimal point and change  $n$ )