Convert exponents to standard forms quiz. This is an online activity showing numbers in expanded forms. Each expanded form of a number can be converted into a standard form. Writing numbers in standard form tends to shorten them and the number of zeros that follow can be expressed as an exponent of ten. For more practice, print out a sheet on converting expanded to standard forms and learn the underlying principles. After getting the skill, solve take more tests and het instant feedback on your score. This quiz is for students in 5th, 6th, and 7th grades.