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

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

Addition : Addition is the mathematical operation that describes increasing a number by an amount equal to a second number. The mathematical symbol for addition is the plus sign $+.$ The term addition is also used for a generalization of this basic operation on numbers to functions, vectors and matrices.

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.

Cube root : The cube root of $x$, normally written as $\sqrt[3]{x}$ or as $x^{\frac{1}{3}}$ is the number whose third power equals $x$. In other words it is defined as the solution of the equation $(\sqrt[3]{x})^3=x.$

Cubed : The cube of a number $x$, or $x$ cubed or $x^3$ is the third power of $x$: $x^3=x\cdot x\cdot x.$ For example 2 cubed equals 8.

Half : A Half is the number equal to $\frac{1}{2}=0.5.$

Negative : A number is negative if it is $\lt 0.$

Negative exponent : A power with a negative exponent $a^{-b}$ is defined as $\frac{1}{a^b}.$

Power : A power is a number of the form $a^b.$ $b$ is called the exponent of the power and $a^b$ is called a power of $a$. For natural numbers $b$ the number $a^b$ is an abbreviation for successively multiplying $a$ by itself $b$ times. For example $2^3=2\cdot 2\cdot 2=8.$ For fractional exponents $b=\frac{p}{q}$ the number $a^{\frac{p}{q}}$ is defined as $\sqrt[q]{a^p}.$ For arbitrary real exponents $b$ the power $a^b$ is defined as the limit of $a^{b_n}$ with rational $b_n$ that converge towards $b.$

Reciprocal value : The reciprocal value of $x\neq 0$ is defined as $\frac{1}{x}.$