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What equals to 631?
1 x 631, 631 x 1
What is the expanded number 107?
107 = (1 x 100) + (0 x 10) + (7 x 1)
What would a variable expression be for twice a number?
If the number is represented by variable x, then twice the number is represented by 2x.
14.200.000 write that number in scientific notation?
14,200,000 in Scientific Notation = 1.42 x 107
What are the rules in subtractin in significant notation?
First ensure that the exponents (the powers of the multipliers of the tens) are the same - if necessary adjust the smaller number by shifting the decimal point left until the powers are the same; for example if the exponents are ``x 105'' and ``x 103'' shift the decimal point of the second number 5 - 3 = 2 places to the left and then the numbers will have the same exponents. Now, align the decimal points and subtract the mantissae (the numbers before the ``x 10'' s) as usual. Finally, adjust the result to correct into standard form if necessary by shifting the decimal point. Examples: 2.3 x 107 - 2.275 x 106 = 2.3 x 107 - 0.2275 x 107 = (2.3 - 0.2275) x 107 = 2.0725 x 107 2.3 x 107 - 2.275 x 107 = (2.3 - 2.275) x 107 = 0.025 x 107 = 2.5 x 105
