What’s on the Significant Figures poster
The rule, 3 worked examples, and the mistake everyone makes.
- Round the final answer to the significant figures of the least precise input.
- Multiply/divide: fewest sig figs · Add/subtract: fewest decimal places
- 2.5 × 3.42 = 8.6
- 12.11 + 3.2 = 15.3
- Constants = Treated as exact
- Common mistake: Rounding at every intermediate step → Rounding once, at the end
Trailing zeros are ambiguous in plain decimal. Standard form removes the ambiguity: 1.20×10³ is clearly three figures.
Questions about the Significant Figures poster
- What’s on the Significant Figures (Methods) poster?
- The rule, 3 worked examples, and the mistake everyone makes. Round the final answer to the significant figures of the least precise input.; Multiply/divide: fewest sig figs · Add/subtract: fewest decimal places; 2.5 × 3.42 = 8.6; 12.11 + 3.2 = 15.3; Constants = Treated as exact; Common mistake: Rounding at every intermediate step → Rounding once, at the end. Trailing zeros are ambiguous in plain decimal. Standard form removes the ambiguity: 1.20×10³ is clearly three figures.
- Who is the Significant Figures (Methods) poster for?
- Significant Figures (Methods) belongs to the Physics section rather than to a school year, because physical science is not something one grade owns. Anyone learning methods can pin it up — a beginner, a student mid-course, or someone revising years later.
- When should you use the Significant Figures (Methods) poster?
- The answer cannot be more precise than the least precise measurement in it. A wall chart earns its place by being glanceable from where the work is happening, so Significant Figures (Methods) belongs on the wall where that physical science work actually happens, within glancing distance, rather than filed away.
- What other posters go with Significant Figures (Methods)?
- Uncertainty, Accuracy & Precision and Analysing Results sit alongside Significant Figures (Methods) in the Physics section. Printed together they make a wall rather than a single sheet, which is how a reference set actually gets used.UncertaintyAccuracy & PrecisionAnalysing Results
- Is the Significant Figures (Methods) poster free to download and print?
- Yes. Significant Figures (Methods) downloads as a free PDF with no account, no email and no watermark, like everything else in the Physics section. Print as many copies as you like for a home, a classroom, a library or a tutoring group; reselling the file is the only thing the licence rules out.Read the licence
- What size does the Significant Figures (Methods) poster print at?
- Significant Figures (Methods) is a vector PDF laid out for US Letter, and prints on A4 with Fit to page — the same file, no separate download. Because every mark on it is drawn rather than photographed, it stays sharp enlarged to A3, A2 or A1 at a copy shop. Colour carries emphasis only, so a greyscale print of Significant Figures (Methods) loses nothing.Printing guide
Related posters
Charts that sit alongside Significant Figures on the same wall.
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