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8 July, 23:07

What's the opposite of - 21? : D

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Answers (2)
  1. 9 July, 00:56
    0
    21

    Step-by-step explanation:

    Opposite number or additive inverse of any number (n) is a number which, if added to n, results in 0, the identity element of addition. The opposite number for n is written as - n.
  2. 9 July, 01:00
    0
    The answer is:21

    Mathematical key for opposite numbers:

    The opposite of a negative number is its positive number.

    The opposite of a positive number is its negative number.

    Therefore, the opposite of - 21 is 21.
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