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 Divisibility Rules - Calculation Tips & Tricks, The Math Forum Tips for figuring out whether a number can be divided by the numbers 3-13, with a Spanish translation and an explanation of why the rules work by Robert L. Ward. more>> Divisibility Rules - Math Forum, Ask Dr. Math FAQ How can you tell whether a number is divisible by another number (leaving no remainder) without actually doing the division? Why do 'divisibility rules' work? more>>
All Sites - 52 items found, showing 1 to 50
 Accurate Census Taking and Orderly Ants (Math Chat) - Frank Morgan; Christian Science Monitor A column of ants marches in single file, until one ant falls away and they then march two by two, until another ant falls away and they then march three by three, and so on until finally they are marching 10 by 10. How many ants were there to start with? ...more>> All About Division (AAA Math) - John Banfill Interactive math exercises, lessons, and games covering division facts and division of whole numbers, decimals, and fractions. ...more>> Class Champ multiplication & division Software intended to help children learn the times table by heart using Pop Times Table songs; show how multiplication works by displaying the question graphically; and quicken the child's ability to recall answers and allow the child to practice questions. ...more>> Conceptual Math Media, Inc. Math educational products for both the classroom and family. Master multiplication facts and divisibility rules with PrimePak playing cards; create equations crossword-style with the Equate board game, also available via e-mail. Order products online ...more>> Curious and Useful Math - Clay Ford Tricks and rules for quickly calculating certain types of math problems, many from the 1888 book The Carpenter's and Joiner's Pocket Companion. Multiplication Tricks; Division Tricks; Squaring Tricks; Can it Divide...?; Age Math; Bible Numbers; Box Tricks; ...more>> Divide! - Andrew Starr A web page used to demonstrate that if you divide any two integers, eventually the decimals will repeat. ...more>> Dividing 12-foot Boards - NASA Lewis Learning Technologies Project Lewis needs 1,500 boards to build a small rocket. Each board must be 3 feet long. If boards are sold in 12 foot lengths, how many boards must Lewis buy and cut into 3 foot pieces to get the 1,500 he needs? A detailed answer is provided. From NASA's 9th ...more>> Dividing by 0 - Math Forum, Ask Dr. Math FAQ Why can't you divide by 0? Why is 0/0 "indeterminate" and 1/0 "undefined"? Why is dividing by zero "illegal"? ...more>> Dividing Decimals - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about dividing decimals, including how to divide decimals with a remainder. ...more>> Dividing Fractions - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about dividing fractions, including an explanation of the "invert-and-multiply" rule. ...more>> Dividing Fractions - Math Forum, Ask Dr. Math FAQ How do you divide fractions? Say, 2/3 divided by 3/4. ...more>> Divisibility Criteria - Interactive Mathematics Miscellany and Puzzles, Alexander Bogomolny A definition of some divisibility criteria, and their derivation from modulo arithmetic, with links to related pages. ...more>> Divisibility Rules to 50 and Beyond - Stephen D.T. Froggatt; Math Forum, Ask Dr. Math FAQ A quick way of testing primality of larger numbers: the idea of deleting the last digit and adding or subtracting a multiple of the digit from the remaining number can be generalized to test for divisibility by prime numbers up to 50 and beyond. ...more>> Divisibility War - Diane Reed A game designed for secondary level students studying basic mathematics to use the divisibility tests to determine whether a number is divisible by 2, 3, 4, 5, 6, 9, and 10. ...more>> Division For Third Graders (SMILE) - Savannah Walker, Mason School A lesson for grade 3 that uses measurement to demonstrate division. From the Arithmetic section of a collection of almost 200 single concept lessons by the Science and Mathematics Initiative for Learning Enhancement. ...more>> Division Worksheets - Guru Angad Educational Team Overviews and freely downloadable PDF worksheets on math facts, math families, basic division, and long division, with step-by-step solutions. ...more>> Don't Hate No Math - Elio Motella Advice for students, parents, and teachers. The document called "Lecture" includes sections such as "The causes of your troubles," "It's called metacognition," and "Mental models and propositional representations"; see in particular Part D, titled "An ...more>> Double Division - Jeff Wilson Double Division is a method for doing manual division that reinforces the principles of division and gives students success with a less frustrating alternative. The online calculator shows and explains each step. Feedback from teachers who've used the ...more>> Equate: The Equation Thinking Game - Conceptual Math Media, Inc. Have fun creating equations crossword-style. An arithmetic version of Scrabble, Equate is a math board game for family and classroom. Earn higher scores by using division or fraction tiles, or by playing tiles on premium board positions that double or ...more>> The Euclidean Algorithm - David Sumner Find the greatest common divisor (GCD) online using the Euclidean Algorithm. Enter two numbers, and the JavaScript calculates GCD, least common multiple (LCM), and linear combination; and displays the steps of the algorithm. ...more>> The Fair Division Calculator - Francis Su An interactive Java applet designed to help you determine how to divide among n people: a desirable object (such as a cake); an undesirable object (such as a set of chores); or a set of indivisible objects (rooms, desirable) with payments (rent, undesirable). ...more>> Fair Shares (MatheMUSEments!) - Ivars Peterson (Math Muse for Kids) The birthday party is over, and one chunk of thickly frosted, richly decorated cake is uneaten. Your mother insists that you and your sister slice the cake into two equal pieces, so that she doesn't have to listen to you fight over which is bigger. What ...more>> The Feeling of Power - Isaac Asimov Science fiction that explores a time when only computers know how to multiply. "...seven times three is twenty-one." "And how do you know that?" asked the congressman. "I just remember it. It's always twenty-one on the computer. I've checked it any number ...more>> Financial Literacy Math Quizzes - HowToSaveMoney.me Quizzes for practicing addition and subtraction of dollar and coin amounts, presented with pictures of US currency or as numerical expressions. "Grade My Quiz" or generate new problems with the click of a button. The site also offers finance calculators, ...more>> Formulas for fairness - Ivars Peterson - Science News Online Applying the math of cake cutting to conflict resolution: researchers turn to the mathematics of cake cutting and point allocation to develop improved methods for people to use to settle disputes. ...more>> Geometric Factoring - Suzanne Alejandre A Math Forum Web Unit. Understanding factoring through geometry: students work cooperatively to display a numeral as the area of a rectangle, and make as many rectangular arrangements as possible for each numeral given. ...more>> Investigating LCM and GCF Using Rods - Margo Lynn Mankus The objective of the lesson plan Investigating LCM and GCF Using Rods is to look at the Least Common Multiple (LCM) and Greatest Common Factor (GCF) from "hands-on" pattern-building to using set theory. With teachers as the intended audience, the activity ...more>> Kids SyvumBook Series - Syvum Technologies, Inc. Interactive educational software for English, Knowledge, and Math, targeted for kids ages 6-12. Each Kids SyvumBook offers multimedia strips and main activity frames. Four levels of Math SyvumBooks help improve arithmetic, algebra, and basic number skills ...more>> Learning to Factor - Math Forum, Ask Dr. Math FAQ Examples of factoring from the Dr. Math archives: trinomials; greatest common factor (GCF); least common multiple (LCM); least common denominator (LCD); dividing polynomials by monomials; quadratics; and more. ...more>> Long Division - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about long division, with step-by-step explanations. ...more>> Magical Methods - Magical Methods Enterprises A source for Vedic mathematics, as developed by Pradeep Kumar. Find examples of arithmetic shortcuts for calculating squares, cube roots, multiplication, and division. Play games such as a calculation speed builder; purchase products to prepare for the ...more>> Math Fun and Educational Gifts and Specials - 24Hours7Days Purchase Clever Catch Balls, Fraction Bars, Decimal Squares, Math Chase, and other board games and manipulatives for practicing addition, algebra, decimals, division, fractions, money, multiplication, patterns, subtraction, and time. ...more>> MathMastery - MathMastery.com Play CyberChallenge Shockwave addition, subtraction, multiplication, and division games. Test Your Skills with placement exams (online or printable) on adding, subtracting, multiplying, dividing, fractions, and decimals. My Math Class offers Shockwave ...more>> Math Problem Solving - Rakiya Rahman Techniques for doing algebra, multiplication, and long division, with examples and worksheets. ...more>> Math Travels - Real World Math An integrated simulation of U.S. travel for grades 4-12. Students develop reading, writing, math, social studies, and art skills by planning vacations across states, applying concepts of measurement, multiplication, division, decimals, and time. The site ...more>> Memory Joggers An aide to learning multiplication and division facts, using multiple learning modalities including seeing, hearing, speaking, drawing, and moving. Site includes description of the product, a sample lesson, description of the teachers' package, and ordering ...more>> Modern Math - Taoufik Nadji, Malek Physix Inc. Mr. Taoufik Nadji's pre-calculus students at Interlochen Arts Academy introduce modern mathematical topics: fair division (methods: divider-chooser, lone divider, lone chooser, last diminsher, markers, sealed bids); graph theory (applications, terms, ...more>> Multi Math - Manuel Perpen This simulator app provides animated exercises for practicing to multiply and divide by powers of ten. ...more>> Next Generation Preschool Math - WGBH Educational Foundation "Can engagement with activities in a media-rich curriculum supplement improve low-income children's early learning of number and equipartitioning?" By developing and evaluating iPad apps for pre-schoolers, tools for tracking their progress, and guides ...more>> NUMDRUM - John T. Harrison The "Numdrum" helps children understand addition, subtraction, and other fundamental arithmetic concepts. An alternative to the number line and the 10 x 10 number square, this "decimal helical number line" lists integers around a tube, ten to a turn, ...more>> Powers of 5 and Traveling to the North Pole (Math Chat) - Frank Morgan; Christian Science Monitor What is the remainder when you divide 5^999,000 by 7? ...more>> Problem-of-the-Week - David Poole; Department of Mathematics, Trent University, Canada Most of these problems can be done using only high school mathematics and logical reasoning. Eight problems with solutions and one without, from the fall of 1997, at Trent University, Canada. An email contact is listed, for those outside the university ...more>> Ralph A. Raimi Homepage - Ralph A. Raimi The University of Rochester Professor Emeritus' notes on math education and non-technical writings with a mathematics theme include Whatever became of the New Math?; Have we forgotten the value of memory?, a comment on the New York Regents' B-examination ...more>> Remainder/Divisibility Puzzles - Math Forum, Ask Dr. Math Common Question A selection of answers to questions about remainder and divisibility puzzles, such as "Write 1,000,000,000 as the product of two numbers, neither of which contains any zeros" and "Arrange the digits 0 to 9 such that the number formed by the first digit ...more>> Rhymin' Times Tables A multimedia software game to purchase for the PC (Windows 95 or later) that uses cartoon characters, musical tunes, and rhymes to teach the times tables, multiplication, and division. A free download is available. ...more>> Sovel Pre-Algebra Class - Barry Sovel In mathematics, we can use the term 'rule', but in reality, there are no rules, only proofs; therefore, we must be able to demonstrate and prove each mathematical statement and expression before we can apply the tag 'rule' to it. Five such demonstrations ...more>> Spliddit - Procaccia, Ariel; Goldman, Jonathan Provably fair solutions to the everyday dilemmas of splitting rent, dividing goods, and sharing credit. Spliddit's algorithms account for individual rationality, efficiency, maximin share, proportionality, the highest feasibility level of fairness, impartiality, ...more>> syzygy-matrix: solutions for small problems in the classroom - Jeff LeMieux Generate cryptograms, division worksheets, fraction worksheets, and proportion problems. Select the length of dividend, denominators specified by the Washington State Standards for Grade 7, number of problems, and more. The worksheet maker prints solutions. ...more>> Terry McConnell's Home Page - Terry McConnell, Mathematics Department, Syracuse University Download PDFs of tests given in McConnell's introductory calculus, Math 295. "Stuff" ranges from a remark on average velocity and an expository paper showing the details of how to derive the second order correction to the period of a plane pendulum using ...more>> Topics in Arithmetic and Elementary Mathematics - E. Lee Lady; University of Hawaii Materials used in a university course for prospective elementary school teachers, to teach them how to be interested in mathematics. Materials are in PDF and DVI, and include: representing numbers in other bases, divisibility tests, periodic decimal expansions, ...more>>
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