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Unformatted text preview: n-th power of 10 ( n – a quantity of decimal places, in
our case n = 4 ) is a denominator: If a decimal doesn’t contain an integer part, zero is put before a decimal point: Properties of decimals.
1. A decimal fraction isn’t changed, if to add some zeros to the right of it:
2. A decimal fraction isn’t changed, if to reject zeros, located in the end: Math I - 11 - Feel free to pass this on to your friends, but please don’t post it online.
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0.00123000 = 0.00123
Note: it’s prohibited to reject zeros, located not in the end of a decimal!
3. A decimal fraction will be increased by 10, 100, 1000 ,…times, if to transfer a decimal point to one, two,
three, … places to the right:
3.675 ---> 367.5 (it increases by 100 times).
4. A decimal fraction will be decreased by 10, 100, 1000 ,…times, if to transfer a decimal point to one, two,
three, … places to the left:
1536.78 ---> 1.53678 (it decreases by 1000 times)
These properties permit quickly to multiply and to divide decimal fractions by 10, 100, 1000 and so on.
Repeating decimal is a decimal in which a digit or a group of digits repeats endlessly in a pattern. This group of
repeating digits is called a period of decimal and is written in brackets. For instance,
E x a m p l e. If to divide 4...
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This note was uploaded on 07/21/2013 for the course UPCAT 2014 taught by Professor Otis during the Spring '13 term at University of the Philippines Diliman.
- Spring '13