## Basic Math Concepts: For Water and Wastewater Plant OperatorsFROM THE PREFACE In the years since the first edition, I have continued to consider ways in which the texts could be improved. In this regard, I researched several topics including how people learn (learning styles, etc.), how the brain functions in storing and retrieving information, and the fundamentals of memory systems. Many of the changes incorporated in this second edition are a result of this research. The changes were field-tested during a three-year period in which I taught a water and wastewater mathematics course for Palomar Community College, San Marcos, California. This first volume, "Basic Math Concepts for Water and Wastewater Plant Operators," provides a thorough review of the necessary mathematical concepts and skills encountered in the daily operations of a water and wastewater treatment plant. Each chapter begins with a skills check to allow the student to determine whether or not a review of the topic is needed. Practice problems illustrate the concepts presented in each section. |

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### Contents

Solving for the Unknown Value | 7 |

Fractions | 27 |

Decimals | 77 |

Percents | 103 |

Averages | 117 |

Ratios and Proportions | 137 |

Conversions | 155 |

Linear Measurement | 203 |

Area Measurement | 213 |

Volume Measurement | 235 |

Scales and Graphs | 257 |

Powers Roots and Scientific Notation | 283 |

Rounding and Estimating | 313 |

Dimensional Analysis | 327 |

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added addition answer arrow average base basic calculations circle circumference common Complete the following concept cone conversion cross cu ft cubic feet decimal fraction decimal number decimal point denominator desired determine diagram diameter divide division equal equation equivalent fractions Example exponent expressed factors Find flow fraction gallons given graph grouping height illustrates improper fraction indicates larger length marks math mean measurement method mg/L mixed number move multiply Number Correct numerator and denominator object Operator percent perimeter place value position possible PRACTICE PROBLEMS proportion ratios rectangle Reduce refer to Chapter represented Round scale score Section segments shapes shown side significant figures skills smaller solve sq ft Step subtraction SUMMARY tank texts units unknown Volume water and wastewater whole number Write written zeros