**NO**greater than the

*least accurate measurement*.

**KEEP IN MIND:**Your answer

**CANNOT**be more precise than the

*least precise measurement*.

1. Addition and Subtraction with Significant Figures

The answer will have the

*same*number of digits to the right of the decimal point as that of the

*least*precise measurement.

For example,

1.25 + 2.589 = 3.839 =

**3.84**(rounded up)

The least precise measurement (1.25) has

*2*digits to the right of the decimal point. Thus, the final answer will have

*2*digits to the right of the decimal point.

2. Multiplication and Division with Significant Figures

The number of significant figures in the answer will be the

*same*as that of the measurement with the

*fewest*number of significant figures.

For example,

2.36 x 1.764 = 4.16304 =

**4.16**(rounded down)

The measurement with the fewest number of significant figures (2.36) has

*3*significant figures. Thus, the final answer will have

*3*significant figures.

3. Combination of Multiplication/Division and Addition/Subtraction

Apply the rules for Addition/Subtraction, followed by the rules for Multiplication/Division.

4. Conversion

The answer will have the

*same*number of significant figures as that the number started with.

For example,

725 mmHg x (1 atm / 760 mmHg) = 0.953947368 =

**0.954**atm

The number started with (725 mmHg) has

*3*significant figures. Thus, the final answer will have

*3*significant figures.

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