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Articles & Books From Pre-Algebra
Absolutely everything you need to get ready for Algebra Scared of square roots? Suspicious of powers of ten? You’re not alone. Plenty of school-age students and adult learners don’t care for math. But, with the right guide, you can make math basics “click” for you too! In Basic Math & Pre-Algebra All-in-One For Dummies, you’ll find everything you need to be successful in your next math class and tackle basic math tasks in the real world.
Cheat Sheet / Updated 03-17-2022
Following are nine little math demons that plague all sorts of otherwise smart, capable folks like you. The good news is that they’re not as big and scary as you may think, and they can be dispelled more easily than you may have dared believe.Know the multiplication tableA sketchy knowledge of multiplication can really hold back an otherwise good math student.
Pre-Algebra Essentials For Dummies (9781119590866) was previously published as Pre-Algebra Essentials For Dummies (9780470618387). While this version features a new Dummies cover and design, the content is the same as the prior release and should not be considered a new or updated product. Many students worry about starting algebra.
Cheat Sheet / Updated 02-24-2022
To successfully study pre-algebra, understand that a specific order of operations needs to be applied. Also recognize some basic math principles, such as the ability to recognize and understand mathematical inequalities, place value, absolute value, and negation.Mathematical order of operationsThe rules for deciding the order to evaluate arithmetic expressions, no matter how complex, are called the order of operations.
Article / Updated 03-26-2016
Although improper fractions are great for solving math problems, the results may be easier for people to understand if you first convert them to mixed numbers. To convert an improper fraction to a mixed number, you follow two simple steps: Divide the numerator by the denominator. For example, suppose you want to write the improper fraction 19/5 as a mixed number.
Article / Updated 03-26-2016
It is easy to convert percents to decimals and decimals to percents. For example, to convert a percent to a decimal, you drop the percent sign (%) and move the decimal point two places to the left. That’s all there is to it. Remember that in a whole number, the decimal point comes at the end. For example, 2.5% = 0.
Article / Updated 03-26-2016
Whether mixed numbers have the same denominators or different denominators, subtracting them is a lot like subtracting whole numbers: you stack them up one on top of the other, draw a line, and subtract. For this reason, some students feel more comfortable subtracting mixed numbers than subtracting fractions. Find the difference of the fractional parts.
Article / Updated 04-25-2016
A line graph shows how a value changes, usually over time. Most line graphs look like a jagged line going across the page. How high the line is above a time marked on the axis tells you how high the value is. A dieter may use a line graph to track how their weight fluctuates as time goes by. A business may use a line graph to track its profits.
Article / Updated 03-26-2016
In algebra, a letter such as x that takes the place of a number in one or more equations is called a variable. Practices you need to know about how algebra problems are written: To add up many of the same variable, count the number of times that variable appears, and then attach that number (called a coeffici
Article / Updated 03-26-2016
Adding fractions that have the same denominator (also called a common denominator) is super easy: Just add the numerators and keep the denominator the same. Sometimes you may have to reduce the answer to lowest terms or change it from an improper fraction to a mixed number. Adding fractions that have different denominators takes a bit of work.