Seven hundred fifty thousand. It is usually easier to see the value of the number when it is separated into groups of three. In the US, it is done with the comma: 750,000 and in other places it is done with the period: 750.000. It is sometimes seen like this, 750 000 with spaces between groups.
Three hundred ten thousand.
"Longhand" is a term to describe writing made using a pen to write on paper.
Sixty-one thousand, seven hundred forty-four dollars and ninety cents.
1,000,000,000,000 becquerels
I think it is 7.5e5
750,000
$750000
4000
7.5 x 105
two thousand and eight
Longhand refers to writing in regular script by hand, as opposed to typing or using shorthand. An example sentence could be: "She preferred to write her journal entries in longhand to feel a deeper connection to her thoughts and emotions."
Seven hundred fifty thousand.