287 rounded to the first digit (ones) is 287.
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∙ 11y ago300
23.1
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9000000 if it's the first 9 9334209 if it's the second 9
To round to the nearest integer, look at the first digit after the decimal point (the tenths digit): if it is less than 5 round down otherwise round up. The tenths digit of 4.8 is 8, so round up thus 4.8 → 5 when rounded to the nearest integer.
74,312 is already rounded to the first digit (ones).
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5.5296
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27.60 rounded to one decimal place is 27.6. The first digit to the right of the . is the tenth.
82.58% (rounded to nearest hundredth).
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The 42nd digit of pi is 6. (The first 43 digits of pi are 3.141592653589793238462643383279502884197169. If pi were rounded to the nearest 42 digits, then the 6 would be rounded up to a seven.)
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