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Multiplication and Division
Round the answer to the same number of significant figures (sig figs) as the measurement with the fewest sig figs in the problem.
34.9cm x 4.7cm = 164.03cm2 = 160cm2 (rounded to two sig figs)
271.0g/99.8cm3 = 2.71543g/cm3 = 2.715 (rounded to four sig figs)
Addition and Subtraction
Round the answer to the same number of decimal places as the measurement with the fewest decimal places.
9.45kg + 8.329kg = 17.78kg (rounded to two decimal places)
120.2589m - 12.351m = 107.908m
Rounding Rules:
If the number to be dropped is less than four, keep the number in front the same. For example, 3.43 would be rounded to 3.4 .
If the number to be dropped is greater than five, round the number in front up by 1. For example, 3.46 would be rounded to 3.5 .
If the number to be dropped is exactly five, keep the number in front the same if it is even. If the number in front is odd, round up by 1.
4.65 rounds to 4.6 .
4.75 rounds to 4.8 .
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What is the importance of determining the rules of significant figures?
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What are the rules to be followed in determining the number of significant figures?
see the link below
Rules of significant figures?
rules to follow in determining the number of sigificant * zero's are not significant at the end of the whole number which does not have a decimal point * EXAMPLE: 3400 ( 2 sf's) 2000 (2sf's)*
Why do scientists use the rules for determining significant figures?
If they did not use rules all their calculations would simply lead to random digits!
Are exact quantities considered when applying significant figure rules?
No, exact quantities are not considered when applying significant figure rules. Exact quantities are known with complete certainty and do not impact the uncertainty associated with measured quantities. Significant figures are only counted based on measured values.
What are the rules in determining the number of significant figures?
You count the number of figures from left to right starting with the first number different from 0. Example: 205 has 3 significant figures 0.0000205 has 3 significant figures 0.000020500000 has 8 significant figures
What are the rules for significant figures in addition?
The rules of significant figures are as follows;1) Significant figures are the first digit in the number that isn't a '0'. Doesn't matter how far behind or in front of the decimal point it is.1st Significant figure of 5098 is 5000. The first number that isn't a '0'.When you get onto the 2nd is when it gets confusing. After the first significant figure, any number which comes after it is a significant figure regardless of whether it is a Zero.Thus the second significant figure of 5098, is 5000 too.And the third? Well, it's the third number in.So the third is 5090.In addition, you add significant figures like any other number. Due to the fact that it is rounded off, however, it will not be exact.
Who many significant numbers does 0.5 have?
0.5 has one significant figure. The zero is simply a place holder to indicate the position of the decimal point. Refer to the related link for rules for significant figures.
What is 1 significant figure of 37.753?
37.753 rounded to one significant figure becomes 40
How do you round 0.00076321 into 3 significant?
Two rules associated with significant figure :-. When rounding off numbers is "If the first figure to be discarded is 5 or more then the previous figure is increased by 1". Zeros must be kept to show the position of the decimal point or to indicate that zero is a significant figure. Then 0.000 must be kept to show the position of the decimal point. 763 are thus the three significant figures and no change is required as the first figure to be discarded is 2 and this is less than 5. The answer to 3 significant figures is 0.000763
What is 6276 as a significant figure?
6276 as a significant figure would be 4 significant figures.
How do you write 1000 with one significant figure?
1000 is written with one significant figure, with only the 1 being a significant figure.
