Reference library39 entries

Tag: rounding

Practical explanations, worked examples, and reference notes for reporting numbers correctly.

Measurement Uncertainty

How Many Sig Figs Should an Uncertainty Have? (Usually One or Two)

The uncertainty in a measurement should be reported with one or two significant figures, depending on the magnitude of the leading digit and the…

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Significant Figures

Significant Figures in Stoichiometry Problems: Precision and Rounding Reference

A comprehensive guide to applying significant figures in stoichiometric calculations, covering rules, standards, common pitfalls, and worked examples.

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Rounding Methods

Rounding Rules for Negative Numbers: A Comprehensive Guide

Learn how rounding rules apply to negative numbers across different conventions (half-up, half-down, half-even, etc.) with standards citations, worked examples, and common pitfalls.

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Addition and Subtraction

Significant Figures in Addition and Subtraction: The Decimal Place Rule

Learn the decimal place rule for significant figures in addition and subtraction, with worked examples, standards citations, and common pitfalls.

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Significant Figures

Captive Zeros: Why Zeros Between Digits Always Count

Zeros between nonzero digits are always significant. Learn the rule, see worked examples, avoid common mistakes, and understand why captive zeros are never ambiguous…

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Significant Figures

Significant Figures Rules for AP Chemistry: The Definitive Reference

Master the rules of significant figures for AP Chemistry with this authoritative reference. Covers all conventions, rounding methods, standards, and common pitfalls, with worked…

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Engineering Notation

Engineering Notation vs Scientific Notation: A Precision Guide

Understand the difference between engineering and scientific notation, their conventions, and how to apply them correctly in precision work.

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Scientific Notation

Scientific Notation on TI-84 and Casio fx-991: A Precision Reference

Master scientific notation on the TI-84 and Casio fx-991 with authoritative rules, worked examples, and standards citations. Learn how these calculators handle significant figures,…

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Multiplication and Division

Significant Figures in Multiplication and Division: The Sig Fig Rule

Learn the essential rule for determining significant figures in multiplication and division: the result must have the same number of significant figures as the…

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