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 Description  
 Inverse Operation:  Pairs of operations that undo each other.
Examples of Inverse Operations

Addition and subtraction are inverse operations.
For example, 1 + 4 = 5 reversely 5 - 4 = 1.

Multiplication and division are inverse operations.
For example, 2 x 3 = 6, reversely 6 3 = 2.