What is 56.54866776 rounded to 1 decimal place?

seriously?

56.548blablabla

to round to 1 decimal place you look at the second number just to the right of the decimal. if it is less than 5 the first number to the right of the decimal stays the same and is included in your answer

if it is 5 or greater the first number to the right of the decimal increases by 1 and your answer now includes it.

56.5 since the number to the right of the five after the decimal is less than five.

56.54866776

=56.5488678

=56.548868

=56.54887

=56.5489

=56.549

=56.55

=56.6

56.5