# Popular & Elementary Math

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### How to Calculate Pints, Quarts, Gallons to and from Pounds.

Volume conversions of pints to quarts to gallons and weight conversion to pounds. A pint is a pound the world around.

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### How to Count the Number of Spherical Candies in a Jar

Estimating the number of pieces of candy in a jar is a classic math problem, often used to test students' ability to use mathematics in real-life situations. If the candy is spherical and all the pieces are the same...

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### How to Work Out Percentages - Some Tricks to Help You Work Out Percentages Without A Calculator

Quick tricks for find percentages without a calculator. In order to find x percent of any number the general way of doing that is to multiply the number by the percentage. Since percentage means hundredths of any...

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### Best Children's Books to Teach Place Value and Base Ten

If your students are having difficulty understanding place value, these books are sure to help. Along with titles of books that address place value are some ideas on how to use them in your classroom.

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### Mental Math Trick: Find the Cube Root of a Perfect Cube (up to 9 digits)

If you want to impress your friends with a mental math trick, you can learn to extract the cube roots of perfect cubes in your head. This trick works for perfect cubes up to 9 digits in length. Simply ask a friend to...

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### Calculate the Thickness of Toilet Paper with Math

Correctly hung toilet paper. Source: Wikimedia Commons. If you're like me, you probably like to do math problems in your head while you sit on the throne. One of the easiest calculations you can do is figure the...

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### What are the Basic Elements in Geometry?

The basic elements of geometry explained in a simple, easy to understand manner that will help you become a master mathematician.

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### How to Calculate Tips in Your Head with Mental Math

Calculating tips in restaurants or anywhere else need not be a chore that requires paper and pencil. Even without a calculator you can find the right amount to tip your server.

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### What is an Array? Repeated Addition Arrays with a Simple, Cheap Manipulative

Learn about arrays and how we can use them to solve equations of addition and multiplication. Easy cheap manipulative for arrays.

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### How Much Is 30% or 40% Off? -- Calculating Percents in Your Head

Learning how to mentally calculate percentages, discounts, taxes, and tips is a useful skill, even in this day and age when we have phones and calculators to do all the math for us. With practice, in less than the...

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