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2.3 Significant Figures in Calculations

- Determine the number of significant figures in a measured number.

- The chemistry book is 8 lbs.

- There are 12 roses in this bouquet.

- 1 m is 100 cm in the metric system.

- The bakery has 20 types of cakes.

- There are students in the lab.

- The oldest flower to have lived was 1.20 years ago.

- The water's density is 1 g/mL.

- The container can hold 1 g of water.

- A neonate has a mass of 1.607 kilograms.

- For an infant, the daily value is 130 mcg.

- There are 106 red blood cells in the sample.

- There were 23 babies born in the hospital in November.

- An adult with the flu has a temperature.

- The brain has a time for a nerve impulse to travel from the feet to significant figures.

- A brain contains a lot of cells.

- The correct number of significant using Positive and Negative figures can be adjusted.

- In the sciences, we measure many things: the length of a bacterium, the volume of a gas sample, the temperature of a reaction mixture, or the mass of iron in a sample.
- The number of significant figures in measured numbers is what determines the answer.

- You can use a calculator to perform calculations faster.
- Calculators can't think for you.
- It's up to you to enter the numbers correctly, press the function keys, and give the answer with the correct number of significant figures.

- To find out how much carpeting you need, you need to divide the length of the room by the width.
- The calculator has a number on it.

- You can place an order for carpeting that will cover an area of 19.8 m2.

- When using a calculator, it is important to look at the original measurements and determine the number of significant figures that can be used for the answer.
- The numbers shown in a calculator display can be rounded off with the following rules.

- A technician uses a calculator.

- The value of a large number is retained by using a number of zeros.

- When the problem has more than one step, the numbers in the numerator are divided by the numbers in the denominator.

- The calculator display has more digits than the figures in the measured num EE or EXP EE or EXP bers allow.
- Using the measured number that has the smallest number of significant figures, 2.8, we round off the calculator display to an answer with two SFs.

- A small whole number can be given by a calculator display.
- For example, if the calculator display is 4, then you can use the three significant numbers.

- Measure the numbers to perform the following calculations.

- Determine the number of significant figures.

- The calculation should be performed.

- To give the same number of significant figures as the measurement with the most significant figures, add zeros.

- The final answer is written so that it has the same number of decimal places as the measurement has the least.

- The zero does not appear after the decimal point in the calculator display if numbers are added or subtracted to give an answer ending in zero.
- For example, 12.0 g is 2.5 g.

- The display on your calculator shows 12 if you subtract 12 from it.
- A significant zero is written after the decimal point.

- Determine the number of places in the number.

- The calculation should be performed.

- Give the same number of decimal places as the measurement has the fewest.

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