Count : To count means to find out the number of objects by adding one for every object.

Decimal point : The point in a decimal separating the digits representing multiples of wholes from the digits representing fractions of wholes.

Hundredth : Hundredth refers to the number $\frac{1}{100}=0.01=10^{-2}.$

Ten thousandth : Ten thousandth refers to the number $\frac{1}{10,000}=0.0001=10^{-4}.$

Least common multiple : The least common multiple of two numbers is a number that is a multiple of both numbers such that there is no smaller number that is also a multiple of both numbers. For example the least common multiple of 4 and 6 is 12.

Multiple : A multiple of a number $x$ is any of the numbers $1x,2x,3x,4x,\ldots.$ For example the multiples of 7 include 7, 14, 21 and 70.

Number : A number $x$ is a mathematical symbol representing a quantity.