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Q: What are the measurements of 44.2 cm 0.123 cm using significant digit rules?
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What is the following expression 77.94 - 5.8 plus 201.681 simplified using the rules of significant figures?

Do the calculations, then round to one decimal digit, since the least precise of the numbers involved has one decimal digit.


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By using front end estimation, the numbers that you start of with have only one significant digit. It is, therefore, nonsense to have an answer with loads of significant digits.


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Using the digits of 1345678, there are 210 three digit numbers in which no digit is repeated.


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How do you round 9174.48 to have the same amount of significant digits as 79.0?

79.0 has three significant figures - as trailing zeros after a decimal point are not usually written, to have been written the zero must have significance. Thus 9174.48 needs to be rounded to 3 significant figures, which is done by using the 4th digit to round the 3rd: the 4th digit is 4, so the number rounds down to 9170


Can you list all the 6 digit combination possibilities for the numbers 1 2 3 4 8 and 9 using each number only once?

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