Math Zone |

SaneSchool |

Excellent work done quickly. |

PDF of divisibility rules and their (detailed) explanations. The explanations try to stay within reach of anyone with knowledge of basic mathematical operations (+, -, x, ÷, exponents, etc.) and are not meant to be mathematically rigorous. This document doesn’t have a specific target audience, e.g. the elementary or advanced student; instead, I think there’s something in there for everyone. If you get bogged down in an explanation, keep reading—there’s easier material ahead. After all, the last divisibility rule is the rule for division by 1, and what could be easier than that? |

Play our Calculation Challenge Game. Just like the 24 playing card game: Choose any 4 integers and try to find as many ways as possible to combine them using only the operations of addition, subtraction, multiplication, and division and any order of parentheses to result in a Goal integer. Our Calculation Challenge Game, however, allows you to choose any integer Goal number, not just 24. Then compare your solutions with the solutions generated by the Calculation Challenge Game. |

Calculation Challenge Game Play the game! |

Prime Numbers These Prime Number items are based on a design we first saw in a Paul Zeitz math lecture. If you are unfamiliar with this design, please see “How to Read the Prime Number Card” below. |

PDF file explaining how to decode the Prime Number Cards. |

PDF inspired by my youngest’s interest in participating in her older brother’s math. Covers some of the basics of manipulating algebraic terms, including definition of an algebraic term, identifying like terms, exponent rules, Distributive Property, warnings about common pitfalls, etc. Prealgebra/early algebra. |

PDF that describes a simple way to think about some ratio problems that makes them easier to understand and solve. Includes several ratio problem examples. |

Ratio Problems New! |