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When adding or subtracting, follow these steps to find a sig figs answer:

1) Add/Subtract numbers regularly.

2) Determine which measurement has the least decimal places.

3) Round final answer to the same number of decimal places.

When multiplying or dividing, follow these:

1) Count the number of sig figs in the numbers you are multiplying/dividing.

2) Multiply/Divide regularly.

3) Round final answer to the same number of sig figs as the measurement with the fewest sig figs.

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Q: How do you round to a significant figure?
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