A subtraction is the inverse of an addition. It is the combination of two numbers to produce their difference. Calcute implements it using either the sub function or, equivalently, the - (minus) operator.
sub(44; 33) 11
44 - 33 11
In a subtraction, the number from which a value is being subtracted is called a "minuend". The value that is subtracted is called the subtrahend. The result of a subtraction is called the "difference".