seven and nineteen hundredths
719 = (7 x 100) + (1 x 10) + (9 x 1)
Writing a number in standard form simply means to express the number in its 'normal' form. Therefore, the way you wrote the number is the standard form for your example.
write the word form and expanded form of the number four
2118077 word form
seven and forty two one hundredths
5.24 is ' Fiver point two four'. NOT 'twenty four' because the '2' is a tenth , not a 'ten'. and '4' is a hundredth, NOT a unit.
It is 719/1000
You can write 14.12 in word form as fourteen and twelve hundredths
One and sixty-five hundredths.
91 in word form is ninety-one.
word form is using words to write a #
The prefix zeroes are trivial, and can be ignored. hence 0030.0 is 30,0 30.0 in word form is 'Thirty point zero'.