to simplify a numerical expression, you replace it with its simplest name. the simplest name for 2 x 8 + 2 x 3 and for 2(8 + 3) is 22.
Expression may include exponents. Using an exponent provide a shorthand way to show a product of equal factors.
An exponent tells how many time a number, the base, is used as a factor. A power has two parts a base and an exponent.
you read the exponent 24 as "two to the fourth power." To simplify 24 , you replace it with its simple name, 16 there are special name for 23 , "two cubed" and 22 , "two squared'