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##### Asked by: Hermina Zuquete

science physics# Why are significant figures important when reporting measurements?

Last Updated: 28th March, 2020

**Significant figures**are

**important**to show the precision of your answer. This is

**important**in science and engineering because no

**measuring**device can make a

**measurement**with 100% precision. Using

**Significant figures**allows the scientist to know how precise the answer is, or how much uncertainty there is.

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Besides, what determines the number of significant figures used in reporting measured values?

**There are three rules on determining how many significant figures are in a number:**

- Non-zero digits are always significant.
- Any zeros between two significant digits are significant.
- A final zero or trailing zeros in the decimal portion ONLY are significant.

Likewise, what are the 5 Rules for significant figures? **Significant Figures**

- Annotation category:
- RULES FOR SIGNIFICANT FIGURES.
- All non-zero numbers ARE significant.
- Zeros between two non-zero digits ARE significant.
- Leading zeros are NOT significant.
- Trailing zeros to the right of the decimal ARE significant.
- Trailing zeros in a whole number with the decimal shown ARE significant.

Also, how does the concept of significant figures relate to uncertainty in measurement?

The **uncertainty** in a **measurement** is an estimate of the amount by which the **measurement** result may differ from this value. **Significant figures** express the precision of a **measuring** tool. When multiplying or dividing **measured** values, the final answer can contain only as many **significant figures** as the least precise value.

Why are significant figures not important in math?

12) **Why are significant figures NOT important** when solving problems in your **math** class? **Math** classes don't deal with measured values. As a result, all of the numbers are considered to be infinitely precise.