# 2.1 Significant Figures

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• Chemistry Study Guides ## Significant Figures Rules for Zeroes

SIGNIFICANT FIGUES 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 FIGUES 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 =