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### 13 Cards in this Set

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• Back
 What are real numbers? Rational and Irrational numbers What are rational numbers? Positive and Negative fractions, integers, decimals, which terminate or repeat. for ex., 4.5674534524152436 or 6 What are irrational numbers? decimals which don't terminate and don't repeat (repetend) for ex., radical 3 or 3.454545454545454545 These numbers are expressed as a ratio of two integers a/b, where b is not equal to 0 Rational numbers ex., -6 = -6/1 or -12/2 etc. (the denominator is 1, which is not equal to zero) What is an integer? Whole numbers and their opposites What is absolute value? Distance a number is from zero on the number line ex., -6 is six away from zero, the same as 6 is also six away from zero (in both examples, six is the absolute value) What are natural numbers? Counting numbers: 1,2,3,4... What is a reciprocal? The number you must multiply by to equal one ex., 5 x ? = 1 5 x 1/5 = 1 ? = 1/5 essentially, the reciprocal is the flipped fraction of the given number: 5/1 ---> 1/5 (the reciprocal) What is the commutative property? ORDER PROPERTY Change order without changing result: a+b=b+a 4+6=6+4 (can be of addition or multiplication) What is the associative property? GROUPING PROPERTY- (a+b)+c=a+(b+c) (4+7)+2=4+(7+2) What is the identity property? SAMENESS PROPERTY- a+0=a a•1=a 4+0= 4 4•1= 4 What is the inverse property? a+-a=0 (property of opposites) 4+-4=0 a•1/a=1 (property of reciprocals) 4•1/4=1 What is the distributive property? a(b+c)=a•b+a•c 4(7+2)=4•7+4•2