how to find significant digits in a number?
311511
['Non-zero digits are always significant.', 'Any zeros between two significant digits are significant.', 'A final zero or trailing zeros in the decimal portion ONLY are significant.']
1244182
Rounding decimals to the nearest whole number To round a number to the nearest whole number, you have to look at the first digit after the decimal point. If this digit is less than 5 (1, 2, 3, 4) we don't have to do anything, but if the digit is 5 or greater (5, 6, 7, 8, 9) we must round up.
651367
For example, 91 has two significant figures (9 and 1), while 123.45 has five significant figures (1, 2, 3, 4 and 5). ... Zeros to the left of the significant figures are not significant. For example, 0.00052 has two significant figures: 5 and 2.
707038
['Step 1: Move the decimal point so that you have a number that is between 1 and 10. ... ', 'Step 2: Count the number of decimal places moved in Step 1 . ... ', 'Step 3: Write as a product of the number (found in Step 1) and 10 raised to the power of the count (found in Step 2).']
75350
For a decimal number that is less than 1, all figures are significant except the leading zeros after its decimal point. For example 0.
794123
A number is divisible by 4 if its last two digits are divisible by 4. For example, 780, 52, and 80,744 are divisible by 4, but 7,850 is not divisible by 4. To check whether a number is divisible by 4, just divide the last two digits of the number by 4.
649736
The trailing zeros do not count as significant. Trailing zeros in a number containing a decimal point are significant. For example, 12.2300 has six significant figures: 1, 2, 2, 3, 0, and 0. The number 0.000122300 still has only six significant figures (the zeros before the 1 are not significant).
572764
Since the zeros to the right of the decimal place are not necessary as place-holders, their inclusion indicates they are significant. Zeros to the right of the decimal place that are NOT merely place holders are significant; these significant zeros will be to the right of non-zero significant digits.
242010
For example, 91 has two significant figures (9 and 1), while 123.45 has five significant figures (1, 2, 3, 4 and 5). Zeros appearing anywhere between two non-zero digits are significant: 101.1203 has seven significant figures: 1, 0, 1, 1, 2, 0 and 3. ... For example, 0.00052 has two significant figures: 5 and 2.
59812
Zeros can be used as (insignificant) place holders to the left of significant digits if the number is a decimal. For example, a mass of 42 g has two significant digits. ... The zeros to the left of the 4 are place holders and not significant: Zeros located to the left of the first non-zero digit are not significant.
616726
['START counting for sig. figs. On the FIRST non-zero digit.', 'STOP counting for sig. figs. On the LAST non-zero digit.', 'Non-zero digits are ALWAYS significant.', 'Zeroes in between two non-zero digits are significant. All other zeroes are insignificant.']
756320
The number of centimeters per inch (2.54) has an infinite number of significant digits, as does the speed of light (299792458 m/s). Once the number of significant figures various values have been determined, the issue then becomes dealing with significant figures when these values are used in calculations.
350919
Leading zeros (zeros before non-zero numbers) are not significant. ... Trailing zeros in a number containing a decimal point are significant. For example, 12.2300 has six significant figures: 1, 2, 2, 3, 0, and 0. The number 0.000122300 still has only six significant figures (the zeros before the 1 are not significant).
689897
Leading zeros (zeros before non-zero numbers) are not significant. For example, 0.00052 has two significant figures: 5 and 2. Trailing zeros (zeros after non-zero numbers) in a number without a decimal are generally not significant (see below for more details). For example, 400 has only one significant figure (4).
325408
['The fractional portion of a number can be trimmed by rounding down with math. floor() .', 'You can determine if a number is an integer by comparing math. floor(x) == x .', 'To round a number to the nearest integer (half up), use math. floor(x + 0.5) .']
683371
['Count digit positions from the left to the right, starting at 1.', 'Sum all the digits in odd positions. ... ', 'Sum all the digits in even positions and multiply the result by 3.']
1303315
['Move the decimal point in your number until there is only one non-zero digit to the left of the decimal point. ... ', 'Count how many places you moved the decimal point. ... ', 'If you moved the decimal to the left b is positive.']