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# Brain Dump

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

1.234 The one is in the: | ones place or whole number place |

1.234 The two is in the: | tenths place |

1.234 The three is in the: | hundredths place |

1.234 The four is in the: | thousandths place |

Even numbers end in: | 0 , 2, 4, 6, 8 |

Odd numbers end in: | 1, 3, 5, 7, 9 |

Even numbers are: | divisible by 2 |

Odd numbers are: | not divisible by 2 |

Prime numbers: on a calculator, divide them by 2, 3, 5, and 7 | get all decimal answers |

Composite numbers: on a calculator, divide them by 2, 3, 5, and 7 | get at lease one whole number |

The angles of a triangle always add up to | 180 |

1/2 | 0.5 |

1/4 | 0.25 |

3/4 | 0.75 |

1/5 | 0.2 |

2/5 | 0.4 |

3/5 | 0.6 |

4/5 | 0.8 |

If you don't know what a fraction is as a decimal | divide the numerator by the demoninator |

1/8 | 0.125 |

3/8 | 0.375 |

5/8 | 0.625 |

7/8 | 0.875 |

1/9 | 0.111 |

2/9 | 0.222 |

3/9 | 0.333 |

1/10 | 0.1 |

2/10 | 0.2 |

3/10 | 0.3 |

1/11 | 0.0909 |

2/11 | 0.1818 |

3/11 | 0.2727 |

4/11 | 0.3636 |

Area of a rectangle | L x W |

Area of a square | L x L |

Area of a triangle | B x H รท 2 |

Perimeter of a rectangle | (2 x L) + (2 x W) |

Volume | L x W x H |

Angles < 90 | acute |

Angle > 90 | obtuse |

Angles = 90 | right |

Angle = 180 | straight |

Mean, median, mode | Measures of CENTER |

Range | Measure of SPREAD |

Mean | Average & Fair Share |

Mean | add all numbers and divide |

Mode | most often |

Median | middle number |

Milli- | 1/100 Will always be the FLY |

Kilo | 1,000 Will always be the HORSE |

Centi- | 1/100 Will always be the FLY |

2 x R = 4 R is the | variable |

5 - ? = 3 ? is the | variable |

Triangle: all side same length | equilateral |

Triangle: 2 sides the same length | isosceles |

Triangle: no sides the same length | scalene |

fly to horse | divide of course |

horse to fly | multiply |

translation | slide |

rotation | turn |

reflection | flip |