"Six point five billion"
I would write it as: eight, point, sixty-five. Or eight, point, six five.
Six point eight five
5,026,501,002
six point one five or six point fifteen
"Six point five billion"
Five point six.
Five hundred two billion, fifty-six thousand, four502,000,056,004
Six billion, five-hundred million
I would write it as: eight, point, sixty-five. Or eight, point, six five.
six billion five hundred six million thirteen thosand four hundred twenty
Six point eight five
5,026,501,002
six point one five or six point fifteen
six and fifty six hundredths
Forty-five point six.
5.6mm is 'five and six-tenths millimeters'. OR five point six millimeters