Number & Operations
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### Interactive

Title | Brief Description | Category | Date |

A prime number calculator that can handle numbers up to 16 digits long | Number & Operations | 9/19/2007 | |

Convert numbers from one base to another. | Number & Operations | 12/16/2005 | |

Ask Nick to take a random step while he braves the edge of a cliff. | Number & Operations | 11/3/2005 | |

Learn to count in binary, including signed notation and adding 2 binary numbers. | Number & Operations | 7/24/2004 | |

Demonstrate the probability of two randomly chosen integers being relatively prime. | Number & Operations | 3/25/2002 | |

See how addition and subtraction work. | Number & Operations | 9/10/2001 | |

Adjust the precision on this web calculator. | Number & Operations | 8/16/2000 | |

Compare rounding and truncation. | Number & Operations | 8/16/2000 | |

A javascript applet for calculating BMI. | Number & Operations | 5/18/2000 | |

Explore addition using visual representation rather than just an abstract concept. | Number & Operations | 4/20/2000 | |

Online random flash card generator for simple math operations. | Number & Operations | 3/8/2000 | |

Create and graphically visualize a floating point system. | Number & Operations | 3/8/2000 |

### Lessons

Title | Brief Description | Category | Date |
---|---|---|---|

A lesson to accompany the "Folding a Rectangular Prism" applet |
Number & Operations |
1/1/2006 | |

How many marbles will the pyramid have, if there are ten flights? |
Number & Operations |
12/14/1998 | |

Use Excel to help students better understand EuclidÂ’s Algorithm, HeronÂ’s Algorithm, and the Estimation of pi. |
Number & Operations |
12/11/1998 | |

Students will reinforce their knowledge of fractions by using online pattern block activities. |
Number & Operations |
7/20/1997 |