Reference library39 entries

Tag: rounding

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

Significant Figures in Excel, Sheets, Python, R, and Calculators: A Precision Reference

Learn how different software tools handle significant figures and rounding, with standards citations, worked examples, and common pitfalls to avoid.

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Significant Figures in Chemistry: Stoichiometry, pH, and Molar Mass

Master significant figures in chemistry with a focus on stoichiometry, pH calculations, and molar mass. Learn rules, standards, and common pitfalls.

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Scientific Notation

Scientific Notation: Complete Guide with Sig Figs, Conversion, and Arithmetic

Master scientific notation with this comprehensive guide covering significant figures, conversion rules, arithmetic operations, and common pitfalls, aligned with ASTM, ISO, and NIST standards.

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Rounding Methods

Rounding Numbers: Every Method and Rule Explained

A comprehensive guide to rounding methods, conventions, and standards, including half-up, half-even, floor, ceiling, and truncation, with worked examples, common pitfalls, and citations to…

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Significant Figures

Are Leading Zeros Significant? (No — Here’s Why)

Leading zeros are never significant. They are placeholders that indicate the position of the decimal point. This article explains the rule, its rationale, and…

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Counted Numbers vs Measured Numbers: Precision and Significant Figures

Counted numbers are exact and have infinite significant figures, while measured numbers carry uncertainty and are limited by the instrument's precision. This guide explains…

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Rounding Methods

Why Different Calculators Give Different Rounded Answers

Different calculators produce different rounded results due to variations in rounding conventions, internal floating-point precision, and display settings. This guide explains the underlying causes,…

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Addition and Subtraction

Why Addition and Multiplication Use Different Sig Fig Rules

Addition and multiplication follow different significant figure rules because they propagate uncertainty differently: addition uses absolute uncertainty, multiplication uses relative uncertainty.

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Significant Figures

Significant Figures in IB Sciences: A Comprehensive Guide for Internal Assessment

Master significant figures for IB Sciences Internal Assessment with our expert guide covering rules, conventions, standards, common pitfalls, and practice problems.

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Measurement Uncertainty

How to Read Uncertainty From a Ruler, Burette, or Digital Meter

Learn the correct way to interpret measurement uncertainty from analog and digital instruments, including significant figures, rounding, and standard conventions.

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