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# Test 1 Review

### Decimals and Integers

Term | Definition |
---|---|

Integers | whole numbers and their opposites {...,-2, -1, 0, 1, 2, ...} |

Whole Numbers | 0, 1, 2, 3, ... |

Multiplying Integers | if the signs are the same ( - and - ) or (+ and +), the product is positive. If the signs are different (+ and -), the product is negative |

Dividing Integers | if the signs are the same ( - and - ) or (+ and +), the product is positive. If the signs are different (+ and -), the product is negative |

Adding Decimals | line up the decimals, attach zeroes so all numbers are written to the same place value, then add. |

Subtracting Decimals | line up the decimals, attach zeroes so all numbers are written to the same place value, then subtract. |

Multiplying Decimals | multiply normally, ignoring the decimal points. Then, put the decimal point in the answer - the number of decimal places in the answer is the sum of the decimal places in the factors |

Dividing Decimals - only the dividend is a decimal | bump the decimal up to the quotient bar and divide |

Dividing Decimals - the divisor is a decimal | move the decimal point over until the divisor is a whole number. Move the decimal point over in the dividend the same number of places and divide. |

Created by:
Math7