Final answer:
The terms matching the four definitions in the question are: numerator (Definition 1), denominator (Definition 2), common denominator (Definition 3), and equivalent fractions (Definition 4).
Step-by-step explanation:
The following pairs match the definitions with their corresponding terms: Definition 1 belongs to term 'a) numerator' as the numerator of a fraction represents the number of equal parts described by the fraction. Definition 2 corresponds to term 'b) denominator' because the denominator in a fraction indicates the total number of equal parts that make up a whole. Definition 3 is linked to term 'c) common denominator' since the common denominator between two or more fractions can be determined by finding the least common multiple of the denominators. Finally, definition 4 is related to term 'd) equivalent fractions' as equivalent fractions are fractions that represent the same part of a whole.
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