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Start counting at the first non-zero number from the left if no decimal place is present- Start counting at the first non-zero number from the right if decimal place is present- When adding/subtracting: round off to least number of decimal places given- When multiplying/dividing: round off to least number of sig figs given

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1. Start counting at the first non-zero number from the left if no decimal place is present
- Start counting at the first non-zero number from the right if decimal place is present

- When adding/subtracting: round off to least number of decimal places given
- When multiplying/dividing: round off to least number of sig figs given





 
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