- #1

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## Main Question or Discussion Point

12.5

100.00

105

2.5 x 10^3

All of these numbers have 3 significant figures right?

100.00

105

2.5 x 10^3

All of these numbers have 3 significant figures right?

- Thread starter Power of One
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12.5

100.00

105

2.5 x 10^3

All of these numbers have 3 significant figures right?

100.00

105

2.5 x 10^3

All of these numbers have 3 significant figures right?

- #2

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No, 12.5 and 105 have three significant figures. Look at the other two again

- #3

mgb_phys

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The last one is two sf, three would be 2.50 x10^3

105 is 3sig fig

105 is 3sig fig

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The last one is two sf, three would be 2.50 x10^3

105 is 3sig fig

I caught that shortly after, thank you.

@pzona- Doesn't 100.00 only have two significant figures, the 1 and the two zeros after the decimal point?

@pzona- Doesn't 100.00 only have two significant figures, the 1 and the two zeros after the decimal point?

- #5

symbolipoint

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100.00 is written to indicate significance to the hundredths place. The number has five significant figures. (from locations of places Hundreds to Hundredths).I caught that shortly after, thank you.

@pzona- Doesn't 100.00 only have two significant figures, the 1 and the two zeros after the decimal point?

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1. Zeros between nonzero digits are always significant (1001, 304)

2. Zeros at the beginning of a number are never significant (0.001, 0.026)

3. Zeros at the end of a number are significant if the number contains a decimal point (e.g. 100.00)

These are pretty easy to remember, and I still find myself going through them in my head every time I need to count significant figures. Hopefully this helps.

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