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Adding, Subtracting, Multiplying and Dividing with Sig Figs.

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Presentation on theme: "Adding, Subtracting, Multiplying and Dividing with Sig Figs."— Presentation transcript:

1 Adding, Subtracting, Multiplying and Dividing with Sig Figs

2 Addition and Subtraction Determine which measurement is least precise by looking at the DECIMAL PLACES present. Round your answer so that it matches the precision of the least precise measurement.

3 Addition and Subtraction Examples 1.1g + 2.03g + 4.45g + 1.900g = ? Identify the precision of each measurement. tenths hundredths thousandths Identify the least precise measurement. least precise measurement Compute answer using calculator. Round answer to match precision of least precise measurement. 9.48g 9.5g rounded to tenths place to match least precise measurement.

4 Addition and Subtraction Examples 40.214g - 10.23g - 2.3g + 12g = ? Identify the precision of each measurement. thousandths hundredthstenthsones Identify the least precise measurement. least precise measurement Compute answer using calculator. Round answer to match precision of least precise measurement. 15.684g 16g rounded to ones place to match least precise measurement.

5 Multiplication & Division Determine which measurement has the least number of sig figs. Round your answer so that it matches the least number of sig figs.

6 Multiplication & Division Examples 2.597g · 4.2g = Identify the amount of sig figs in each measurement. 4 s.f.2 s.f. 3 s.f. Identify the least amount of sig figs. least amount of sig figs Compute answer using calculator. Round answer to match the least number of sig figs. 0.4195153846g 0.42g rounded to 2 s.f. to match least number of sig figs. 26.0g

7 Multiplication & Division Examples (4.597cm)(0.3cm)(14.7cm) = Identify the amount of sig figs in each measurement. 4 s.f.1 s.f.3 s.f. Identify the least amount of sig figs. least amount of sig figs Compute answer using calculator. Round answer to match the least number of sig figs. 20.27277cm 20cm rounded to 1 s.f. to match least number of sig figs.

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