Subtracting from a number another number, which is 1 less than the original one.
Illustrative Example:
If we subtract from a number a number, which 1 less than the original one, then the difference will be 1.
Proof
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Child types
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Pattern examples
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Practice exercises
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If we subtract from a number a number, which 1 less than the original one, then the difference will be 1.
Illustrative Example: