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# Math Prop 1&2

### Math Prop1&2

Question | Answer |
---|---|

simple interest formula | I=prt I=interest in dollars P=principal in dollars R=annual interest rate written as a decimal T=time in years |

addition property of equality | for every real nnumber a,b,and c,if a=b,then a+c=b+c |

inverse property of multiplication | for every nonzero number a,there is a multiplicative inverse such that ax1/a=1 |

percent equation | a=p%xb,where b does not=0 |

identity property of addition | for every real number a,a=0=a |

percent of change | p%=amount of increase or decrease/original amount amount of increase= new amount- original amount amount of decrease= original amount- new amount |

associative property of addition | for every real number a,b,and c,(a+b)+c=a+(b+c) |

order of operations | 1) perform an operation(s) inside grouping symbols. 2) simplify powers. 3) multiply and divide from left to right. 4) add and subtract from left to right. |

identity property of multiplication | for every real number a,ax1=a |

commutative property of multiplication | for every real number a and b,axb=bxa |

multiplication property of -1 | for every real number a,-1xa=-a |

commutative property of addition | for every real number a and b,a+b=b=a. |

inverse property of addition | for every real number a,there is an additive inverse -a such that a+(-a)=0 |

percent proportion | a/b=p/100, where b is not=0 |

subtraction property of equality | for every real number a,b,and c,if a=b, then a-c=b-c |

associative property of multiplication | for every real number a,b,and c,(axb)xc=ax(bxc) |

zero property of multiplication | for every real number a,ax0=0 |

relative error | measured or estimated value- actual value/actual value |

distributive property | for every real number a,b,and c: a(+c)=ab+ac (b+c)a=ba+ca a(b-c)=ab-ac (b-c)a=ba-ca |

division property of equality | for every real number a,b,and c,where c is not=0, if a=b, then a/c=b/c |

cross products of a proportion | if a/b=c/d,then ad=bc |

multiplication property of equality | for every real number a,b,and c,if a=b,then axc=bxc |

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