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SigMaster Pro

Master Significant Figures

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Sig Fig Detective

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Significant Figures Calculator

Enter a number to analyze its significant figures:

Analysis Result

Sig Fig Calculator

Perform calculations while maintaining proper significant figures:

0

Interactive Sig Fig Tutorial

1/5 Lessons

1. What Are Significant Figures?

Significant figures (sig figs) are the digits in a number that carry meaning about its precision.

Example: 450 has 3 significant figures

0.045 has 3 significant figures (leading zeros don't count)

2. Rules for Counting Sig Figs

1. All non-zero digits are significant (1-9)
2. Leading zeros are never significant
3. Trailing zeros are significant if there's a decimal point
4. Zeros between non-zero digits are significant

Practice: How many sig figs in 100.20?

Answer: 5 sig figs (1, 0, 0, 2, 0 - the decimal makes trailing zeros count)

Sig Fig Quiz Challenge Score: 0

0/10

1. How many significant figures are in 0.00250?

A) 3

B) 2

C) 5

Worksheet Generator Teacher Mode

Basic Counting Advanced Problems Mixed Difficulty

Sig Fig Detective Game Mode

Identify the significant figures in each mystery number!

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Level 1

Calculation History

Real World Impact

Medical Dosage

A doctor prescribes "2.5 mg" vs "2.50 mg" of medication:

• 2.5 mg: Precise to ±0.1 mg (2 sig figs)
• 2.50 mg: Precise to ±0.01 mg (3 sig figs)

Impact: The extra significant figure could be critical for potent drugs.

SigMaster Pro 2025 created by Creators Ai Toolkit | Free educational tool

Significant Figures Rules Explained

Here's why your number has the significant figures it does:

Why Significant Figures Matter

Significant figures are crucial because they:

• Show the precision of measurements
• Prevent false accuracy in calculations
• Are essential in science, engineering, and medicine
• Help communicate the reliability of data