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EMC 2 - Compare & Order Rationals
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Essential Math Concepts are a reorganization of the Grade 7 California standards into eight categories. The topics comprise 70% of the CST questions.
Terms in this set (17)
base
A side of a polygon or a face of a solid figure by which the figure is measured or named.
denominator
The number or term below a fraction bar. In 3/4, 4 is the denominator.
equivalent fractions
Fractions that name the same number. 3/4=6/8.
exponent
The number that indicates how many times the base is used as a factor, 4x4x4, 4 is the base, 3 is the exponent.
fraction/division bar
The line symbol between the numerator (top) and denominator (bottom).
hypotenuse
In a right triangle, the side opposite the right angle (90 degrees).
irrational number
A number that cannot be expressed as a repeating or terminating decimal, p/q.
leg
In a right triangle, either of the two sides that intersect to form the right angle; in an isosceles triangle, one of the two congruent sides.
perfect square
A number that has an integer as its square root: 9, 16, 25.
Pythagorean Theorem
In any right triangle, if a and b are the lengths of the legs and c is the length of the hypotenuse, then a-squared + b-squared = c-squared: 9+16=25.
rational number
Any number that can be expressed as a ratio a/b where a and b are integers and b is not equal to 0.
real number
A rational or irrational number.
repeating decimal
A decimal in which one or more digits repeat endlessly: 5.272727 or 5.27 bar.
scientific notation
A method of writing very large or very small numbers by using powers of 10: 120=1.2x10-squared.
simplest form
The result of combining like terms in an expression or removing identical terms from a numerator and denominator: 2y+5y=7y, 12/15=4/5.
standard notation
A number written without exponents: an integer or a decimal fraction.
terminating decimal
A decimal that ends; a decimal for which the division operation results in a remainder of zero: 0.625
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