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Introduction
What most skilled trades work requires?
Most skilled-trades work requires a strong working knowledge of practical mathematics.
How this study unit will supports you in mathematics?
This study unit will reinforcewhat you already know about math and will show you howto apply your math skills to solve real-world trades-relatedproblems.
This study unit deals with what?
In this study unit, You’ll encounter a method of expressing part of a whole number—fractions.
Why it is required to study fractions?
Not all things are measured in wholes. Therefore, we have a way of mathematically dealing with partial quantities. That’s where fractions come in. For example, in electrical work you’ll find heaters with ratings expressed in watts, and on blueprints you’ll often find measurements that include fractions such as 3⁄4 inch. In fact, a good working knowledge of fractions is a must for any trade.
What will you learn in this study unit?
In trades work you’ll often have to measure things to find their lengths, areas, volumes, angles, and other dimensions.The most common measurement involves distance or length.In this study unit, you’ll learn about units of length and angles, as well as methods of measuring lengths and angles.
In this study unit you’ll also be introduced to the concept of solving problems with formulas. You’ll learn how to set up formulas to find a needed quantity and how to solve the formula, once it’s set up.
When you complete this study unit, you'll be able to?
1-Simplify, add, subtract, multiply, and divide fractions
2-Change fractions to decimals and decimals to fractions
3- Solve problems involving percent, ratios, and proportions
4-Measure using both English and metric units of length
5-Calculate the areas and perimeters of commonly encountered shapes
6-Use a protractor to measure angles
7-Explain the use of variables in formulas
8- Prepare and use formulas to solve problems
9-Work with square roots
Contents
What are the main headings in this study unit?
1-FRACTIONS
2-OPERATIONS WITH FRACTIONS
3-DECIMALS AND PERCENTS
4-RATIOS AND PROPORTIONS
5-MEASUREMENTS AND UNITS OF LENGTH
6-DEVICES FOR MEASURING DISTANCE
7-ANGLES
8-SIMPLE FORMULAS
Fractions
What are the subheadings of fractions?
What Is a Fraction?
Proper and Improper Fractions
Reading Fractions
Uses of Fractions
Equivalent Fractions
Reducing Fractions
Solving a Simple Industrial Problem
Changing Improper Fractions to Mixed Numbers
Changing Mixed Numbers to Improper Fractions
Fractions_What is a Fraction?
Define what is a fraction?
The word fraction means “broken.” A fraction represents partof a whole that’s been broken into equal-size pieces.
Give an example of a fraction from every day life?
Fractions crop up so often in our everyday dealings thatsometimes we use them without really thinking about them.Even small children use fractions. When one child has a cookie, for example, and a friend wants part of the cookie,the child must break the cookie in half in order to share it.Each child will get one half (1⁄2) of the cookie, and 1⁄2 is afraction.
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