2.1 Significant Figures
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Significant Figures Rules for Zeroes
| SIGNIFICANT FIGURES RULES FOR ZEROES |
|---|
1. Zeroes at the beginning of a number are NOT significant.  |
2. Zeroes at the end of a number and to the left of the decimal point are NOT significant.  |
3. Zeroes at the end of a number and to the right of the decimal point ARE SIGNIFICANT.  |
4. Zeroes in between significant figures ARE SIGNIFICANT.  |
Significant Figures Rules for Multiplication/Division and Addition/Subtraction
| SIGNIFICANT FIGURES RULES FOR ADDITION/SUBTRACTION AND MULTIPLICATION/DIVISION | |
|---|---|
| Multiplication / Division | Addition / Subtraction |
| The answer is rounded to the same number of significant figures as the term with the fewest significant figures. (2.40)(1.09)(310) = | The answer is rounded to the same decimal place as the most precise decimal place in the least precise term. 104.17 + 36 + 4720 = |