A | B |

clustering | An estimation method in which a group of numbers close in value are rounded to the same number. |

expanded form | The sum of the products of each digit and its place value of a number. |

standard form | Numbers written without exponents. |

equivalent decimals | Decimals that name the same number. |

front-end estimation | An estimation method in which the front digits are added or subtracted first, then the digits in the next place value position are added or subtracted. |

dividend | In a division problem, the number that is being divided. |

divisor | In a division problem, the number of parts that a number is being divided into. |

quotient | The answer to a division problem. |

factor | In a multiplication problem, the numbers being multiplied together. |

product | The answer to a multiplication problem. |

addend | In an addition problem, the numbers being added together. |

sum | The answer to an addition problem. |

difference | The answer to a subtraction problem. |