Enclose the 'A' number by two numbers with a single digit after the decimal point and whose difference is equal a one-tenth.

Two numbers that frame so the number 'A':

The truncation to the tenth of the number 'A' is one that is less than the number 'A'

Rounding to one-tenth of the number is the one that is closest to the number 'A'

What is the truncation to the tenth of the number 'A'?

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