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Math 7- Unit 1

Intro to Math 7

TermDefinition
Counting Numbers Natural, Positive Numbers {1,2,3,...}
Whole Numbers Counting Numbers including 0. {0,1,2,3,...}
Integers The set of counting numbers. They are positive, negative and 0. {...,-3,-2,-1,-,1,2,3,...}
Rational Numbers Any number that can be written as a fraction. These can also be repeating and terminating decimals.
Irrational Numbers These are non-repeating, non-terminating (doesn't end) decimals. Ex. Pi, rad 2, 32.1234...
Place Value The spot in the before or after the decimal point.
Loss Negative
Gain Positive
Below Sea Level Negative
Withdrawel Negative- takeout
Profit Positive- gain
Absolute Value Distance away from 0
Eliminate double signs When subtracting a negative number, change to adding a psotive.
When multiplying an odd number of negative signs, what is your answer? Negative
When multiplying an even number of negative signs, what us your answer? Positive
Common Denominator When we try to add/subtract fractions with different denominators, we must find a common "same" denominator to be able to add/subtract them.
Simplify To put into smallest terms
Divide Fractions Multiply by the reciprocal of the fraction. (flip it)
Reciprocal of 3 is? 1/3
Reciprocal of -4 is? -1/4
Reciprocal of 2/3 is? 3/2
Order of Operations (OOO) Parenthesis Exponents Multiply/Divide (whichever comes first) Add/Subtract (whichever comes first)
Commutative Property of Add/Mult The order of the numbers DON'T affect the sum or product
Associative Propeerty of Add/Mult The way the numbers are paired DOESN'T affect the sum or product
Distributive Property Multiplication can be distributed over addition or subtraction
Additive Identify When 0 is added or subtracted from any number, the number remains unchanged. (keeps identity)
Additive Inverse (opposite) The sum of any number and its additive inverse (opposite) is zero (the additive identity) "negate the number"
Multiplicative Identity When any number is multiplied by 1 the number remains unchanged (keep its identity)
Multiplicative Inverse The product of any number and its multiplicative inverse (its reciprocal) is 1. *0 has no multiplicative inverse*
Multiplication Property of 0/ Zero Product Property The product of 0 and any number is 0.
Created by: Akniff
 

 



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