Numerator: The number above the fraction line. Represents how many parts are taken.

Denominator: The number below the fraction line. The number represents the total number of equal parts.  

Commutative: the order of the operations do not matter. 

Unit Fraction: A fraction where the numerator is 1 and the denominator is a positive integer.

Improper Fraction: A fraction where the numerator is greater than the denominator.

Mixed Fraction: A whole number and a fraction combined into one "mixed" number. (also called mixed numbers)

Integer: A number with no fractional part (no decimals). (e.g. -16, -3, 0, 1, 198)

Reciprocal: A pair of numbers that multiply together to give 1. The reciprocal of a number is: 1 divided by the number. 

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Command words:   

Work out: get an answer to a mathematical question

Convert: to change a value or expression from one form to another 

Solve: to find a value we can put in place of a variable that makes the equation true. 

Simplify the expressions: combining like terms by following the operations