Practice time! Build, read, & write three-digit numbers using base-10 blocks and symbols. Practice time! Build, read, write (in standard and expanded form), and represent three-digit numbers using ...

Standard form, or standard index form, is a system of working with, and writing, very large or very small numbers. It is based on using powers of 10 to express how big or small a number is.

Standard form can be calculated on a scientific calculator with the ‘exponent’ button. The exponent button may be shown as EXP, EE or × 10 x.