300th or three hundredth.
300 = three hundred.
Writing a number in standard form simply means to express the number in its 'normal' form. Therefore, your example is written in standard form as: 300,000
300,000,000
three hundred
300
3,002,005
1 300 000 000
3(100)+7
The number 1333 in expanded form is: 1000 300 30 3
9000 + 300 + 80 + 7
300+20+7+.40+.06
The standard form is expressed as 11,106,300