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- https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(LibreTexts)/02%3A_Measurement_and_Problem_Solving/2.04%3A_Significant_Figures_in_CalculationsTo round a number, first decide how many significant figures the number should have. Once you know that, round to that many digits, starting from the left. If the number immediately to the right of th...To round a number, first decide how many significant figures the number should have. Once you know that, round to that many digits, starting from the left. If the number immediately to the right of the last significant digit is less than 5, it is dropped and the value of the last significant digit remains the same. If the number immediately to the right of the last significant digit is greater than or equal to 5, the last significant digit is increased by 1.
- https://chem.libretexts.org/Courses/Riverland_Community_College/CHEM_1000_-_Introduction_to_Chemistry_(Riverland)/02%3A_Measurement_and_Problem_Solving/2.04%3A_Significant_Figures_in_CalculationsTo round a number, first decide how many significant figures the number should have. Once you know that, round to that many digits, starting from the left. If the number immediately to the right of th...To round a number, first decide how many significant figures the number should have. Once you know that, round to that many digits, starting from the left. If the number immediately to the right of the last significant digit is less than 5, it is dropped and the value of the last significant digit remains the same. If the number immediately to the right of the last significant digit is greater than or equal to 5, the last significant digit is increased by 1.
- https://chem.libretexts.org/Workbench/OpenStax_Chemistry_Remixed%3A_Clovis_Community_College/01%3A_Essential_Ideas_of_Chemistry/1.05%3A_Measurement_Uncertainty_Accuracy_and_PrecisionQuantities can be exact or measured. Measured quantities have an associated uncertainty that is represented by the number of significant figures in the measurement. The uncertainty of a calculated val...Quantities can be exact or measured. Measured quantities have an associated uncertainty that is represented by the number of significant figures in the measurement. The uncertainty of a calculated value depends on the uncertainties in the values used in the calculation and is reflected in how the value is rounded. Measured values can be accurate (close to the true value) and/or precise (showing little variation when measured repeatedly).
- https://chem.libretexts.org/Bookshelves/General_Chemistry/Chem1_(Lower)/03%3A_Measuring_Matter/3.03%3A__Significant_Figures_and_Rounding_offThe numerical values we deal with in science (and in many other aspects of life) represent measurements whose values are never known exactly. Our pocket-calculators or computers don't know this; they ...The numerical values we deal with in science (and in many other aspects of life) represent measurements whose values are never known exactly. Our pocket-calculators or computers don't know this; they treat the numbers we punch into them as "pure" mathematical entities, with the result that the operations of arithmetic frequently yield answers that are physically ridiculous even though mathematically correct.
- https://chem.libretexts.org/Courses/University_of_Illinois_Chicago/NATS_106%3A_Chemical_and_Biological_Systems_(UIC)/02%3A_Measurement/2.04%3A_Rounding_Off_NumbersBefore dealing with the specifics of the rules for determining the significant figures in a calculated result, we need to be able to round numbers correctly.
- https://chem.libretexts.org/Workbench/Pick_Your_Poison%3A_Introduction_to_Materials_Toxicology/05%3A_Measurement_Uncertainty_Accuracy_and_PrecisionQuantities can be exact or measured. Measured quantities have an associated uncertainty that is represented by the number of significant figures in the measurement. The uncertainty of a calculated val...Quantities can be exact or measured. Measured quantities have an associated uncertainty that is represented by the number of significant figures in the measurement. The uncertainty of a calculated value depends on the uncertainties in the values used in the calculation and is reflected in how the value is rounded. Measured values can be accurate (close to the true value) and/or precise (showing little variation when measured repeatedly).
- https://chem.libretexts.org/Courses/Saint_Francis_University/CHEM_113%3A_Human_Chemistry_I_(Zovinka)/01%3A_Matter_and_Measurements/1.09%3A_Rounding_Off_NumbersBefore dealing with the specifics of the rules for determining the significant figures in a calculated result, we need to be able to round numbers correctly.
- https://chem.libretexts.org/Courses/Anoka-Ramsey_Community_College/Introduction_to_Chemistry/02%3A_Measurements/2.04%3A_Significant_Figures_in_CalculationsTo round a number, first decide how many significant figures the number should have based on calculation rules. Once you know that, round to that many digits, starting from the left. If the number imm...To round a number, first decide how many significant figures the number should have based on calculation rules. Once you know that, round to that many digits, starting from the left. If the number immediately to the right of the last significant digit is less than 5, it is dropped and the value of the last significant digit remains the same. If the number immediately to the right of the last significant digit is greater than or equal to 5, the last significant digit is increased by 1.
- https://chem.libretexts.org/Courses/Bellingham_Technical_College/Bellingham_Technical_College_CHEM_121/01%3A_Module_1_-_Matter_and_Measurement/1.12%3A_Significant_Figures_in_CalculationsTo round a number, first decide how many significant figures the number should have. Once you know that, round to that many digits, starting from the left. If the number immediately to the right of th...To round a number, first decide how many significant figures the number should have. Once you know that, round to that many digits, starting from the left. If the number immediately to the right of the last significant digit is less than 5, it is dropped and the value of the last significant digit remains the same. If the number immediately to the right of the last significant digit is greater than or equal to 5, the last significant digit is increased by 1.
- https://chem.libretexts.org/Courses/Nassau_Community_College/General_Chemistry_1/01%3A_Essential_Ideas_of_Chemistry/1.05%3A_Measurement_Uncertainty%2C_Accuracy%2C_and_PrecisionQuantities can be exact or measured. Measured quantities have an associated uncertainty that is represented by the number of significant figures in the measurement. The uncertainty of a calculated val...Quantities can be exact or measured. Measured quantities have an associated uncertainty that is represented by the number of significant figures in the measurement. The uncertainty of a calculated value depends on the uncertainties in the values used in the calculation and is reflected in how the value is rounded. Measured values can be accurate (close to the true value) and/or precise (showing little variation when measured repeatedly).
- https://chem.libretexts.org/Courses/North_Central_State_College/CHEM_1010%3A_Introductory_Chemistry/01%3A_The_Chemical_World/1.02%3A_Scientific_Notation_-_Writing_Large_and_Small_Numbers/1.2.02%3A_Significant_Figures_in_CalculationsTo round a number, first decide how many significant figures the number should have. Once you know that, round to that many digits, starting from the left. If the number immediately to the right of th...To round a number, first decide how many significant figures the number should have. Once you know that, round to that many digits, starting from the left. If the number immediately to the right of the last significant digit is less than 5, it is dropped and the value of the last significant digit remains the same. If the number immediately to the right of the last significant digit is greater than or equal to 5, the last significant digit is increased by 1.
