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Level 273

Rational, Irrational & Square Roots


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Rational Number
Any number that can be expressed as a ratio of two integers. Example; 6 can be expressed as 6/1, and 0.5 as 1/2.
Irrational Number
A number that cannot be written as a fraction with a numerator and a denominator that are integers. The decimal representation of a rational number either ends or repeats.
reciprocal
One of two numbers whose product is 1; it is also called multiplicative inverse.
relatively prime
When the GCF of two numbers is one
numerator
the top part of a fraction
denomenator
the bottom number in a fraction
Repeating Decimal
A decimal in which one or more digits repeat infinitely. Example: 0.757575...
Terminating Decimal
A decimal number that ends or terminates. Example: 6.75
least common denomenator
the least common multiple of the denomenator
Divide Fractions
find reciprocal of 2nd number and multiply
Square
P=s+s+s+s
Square Root
when multiplying a number by itself to get a square number
Perfect Square
the number that forms when two same numbers are multiplied together
Principal Square Root
the nonnegative square root of a number
The answer would be 0
What if a square root is 0?
The answer would be 1
What if a square root is 1?