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9+800 is how you write it in standard form
309,512,805
803
It is: (DCCC) which means 1000*800 = 800,000
three million, ten thousand, and eight hundred
To write the number 800 in a diary, simply jot down the numerals "800." This is the standard way to represent the number in written form.
9+800 is how you write it in standard form
309,512,805
803
Each of those numbers already is in standard form.
The standard form is 4,800,000
The standard form is: 200,000,000,010,000,070,000,300,080,010
To write an integer as a fraction in its simplest form simply write the number divided by 1. 800 = 800/1
3810
As 800 is a whole number (as shown in the question) then: 800.00
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.
Assuming those were added, the standard form is: 2,070,173,810