--- title: How Significant Figures Are Handled in Stemble description: Learn how significant figures are interpreted in Stemble and how to enter numerical answers correctly. --- [Skip to content](https://support.stemble.com/significant-figures#main-content) English Show submenu for translations [More support](https://support.stemble.com/kb-tickets/new?hsLang=en) ![Stemble Logo](https://support.stemble.com/hubfs/Stemble%20Logo.svg) Open main navigation Close main navigation - English Show submenu for translations - [More support](https://support.stemble.com/kb-tickets/new) - [Contact Support](https://app.stemble.com/support) [Contact Support](https://app.stemble.com/support) How can we help you? - There are no suggestions because the search field is empty. 1. [Knowledge Base](https://support.stemble.com/?hsLang=en) 2. [Submitting Work](https://support.stemble.com/submitting-work?hsLang=en) 3. [Inputting Your Answer](https://support.stemble.com/submitting-work?hsLang=en#inputting-your-answer) # How Significant Figures Are Handled in Stemble ## Why correct math can still be marked incorrect — and how to avoid it ### **TL;DR — Significant Figures in Stemble** - Stemble evaluates significant figures **exactly as entered** - Trailing zeros are interpreted literally, not by intent - Use scientific notation to show precision unambiguously - Rounding too early can introduce errors in multi-part questions ### How Significant Figures Are Interpreted Stemble evaluates the number you enter **exactly as written**. Unlike a human grader, the system cannot infer your intended level of precision from context. This means that: - Digits you include are treated as significant - Digits you omit are treated as not significant - Trailing zeros are interpreted based on how the number is written, not how you meant it If the system reports an issue with significant figures, it is responding to the *format* of your answer, not judging your understanding of the chemistry. --- ### Trailing Zeros and What They Mean Trailing zeros are one of the most common sources of confusion. In chemistry (and most sciences), a human grader may interpret the number `500` based on context. A computer cannot. Here’s how Stemble interprets different ways of writing the same value: - `500` → **ambiguous precision** - `5e2` → **one significant figure** - `5.00e2` → **three significant figures** If precision matters, scientific notation is the most reliable way to communicate it unambiguously. For example: - If your answer is **one significant figure**, write `5e2` - If your answer is **three significant figures**, write `5.00e2` Writing `500` alone does not reliably communicate either case. --- ### Using Scientific Notation to Show Precision Scientific notation allows you to explicitly control the number of significant figures in your answer. If you are unsure how to enter scientific notation correctly, see: [How to Enter Scientific Notation in Stemble](https://support.stemble.com/scientific-notation?hsLang=en) Using scientific notation is often the *safest* choice when trailing zeros are involved. --- ### Significant Figures in Multi-Part Questions Significant figure issues often appear in **multi-part questions**, especially when later parts depend on earlier calculations. A common failure mode looks like this: - You calculate an intermediate value - You round it and submit that rounded value - You re-enter the rounded value in a later step - Rounding error accumulates and affects the final result Even if each individual step seems reasonable, early rounding can push later answers outside the accepted range. To avoid this: - Keep full precision in your calculator for intermediate steps - Only round when asked for a final answer - Avoid retyping rounded intermediate values into later parts of a question --- ### Why a Correct Calculation Can Still Be Marked Incorrect If your math is correct but your answer is marked incorrect, common reasons include: - An incorrect number of significant figures - Ambiguous trailing zeros - Rounding too early in a multi-step calculation - Entering a rounded intermediate value instead of the full-precision result In most cases, this reflects a **precision or formatting issue**, not a misunderstanding of the chemistry. --- ### What to Do If You’re Unsure About Significant Figures If you’re unsure **how many** significant figures are expected: - Check the question instructions carefully - Review course-specific guidance from your instructor If you believe the issue is related to **how** your answer was interpreted: - Review this article and the scientific notation guide - Contact support with your course name, assignment name, and task number Grading expectations and tolerances are set by your **instructor**, so conceptual questions about significant figures should be directed to them. - [Submitting Work](https://support.stemble.com/submitting-work?hsLang=en#main-content) - [Inputting Your Answer](https://support.stemble.com/submitting-work?hsLang=en#inputting-your-answer) - [Image & File Uploads](https://support.stemble.com/submitting-work?hsLang=en#image-file-uploads) - [Account & Access](https://support.stemble.com/account-access?hsLang=en) - [Simulations](https://support.stemble.com/simulations?hsLang=en#main-content) - [Getting Started](https://support.stemble.com/simulations?hsLang=en#getting-started) - [Troubleshooting](https://support.stemble.com/simulations?hsLang=en#troubleshooting) - [Contact Support](https://app.stemble.com/support) [![Stemble Logo](https://support.stemble.com/hubfs/Stemble%20Logo.svg "Stemble Logo")](https://support.stemble.com?hsLang=en) Knowledge Base Copyright © 2025, Stemble Learning Inc