Look for and express regularity in repeated reasoning. Introduction 10 minutes This lesson is mainly about the mechanics of long division as applied to converting a fraction to a decimal value.
For more general tire information, see my Tires article. Bicycle tires come in a bewildering variety of sizes. To make matters worse, in the early days of cycling, every country that manufactured bicycles developed its own system of marking the sizes.
The same size tire would be known by different numbers in different countries. Even worse, different-sized tires that were not interchangeable with one another were often marked with the same numbers! This page covers sizes in common use as of its writing, and a number of older sizes.
Sutherland's Handbook for Bicycle Mechanics, 3rd through 6th edition, covers dozens of additional, antique sizes. Better bike shops have a copy.
Traditional Sizing Systems The traditional sizing systems are based on a measurement of the outside diameter of a tire.
This would usually be measured in inches 26", 27", etc. Unfortunately, evolution of tires and rims has made these measurements lose contact with reality.
Here's how it works: Let's start with the 26 x 2. This size tire is very close to 26 inches in actual diameter. Some riders, however were dissatisfied with these tires, and wanted something a bit lighter and faster.
The industry responded by making "middleweight" tires marked 26 x 1. This same rim size was adopted by the early pioneers of west-coast "klunkers", and became the standard for mountain bikes.
A second number or letter code would indicate the width of the tire. Inch-based designations sometimes express the width in a decimal 26 x 1. This is the most common cause of mismatches. Although these size designations are mathematically equal, they refer to different size tires, which are NOT interchangeable.
It is dangerous to generalize when talking about tire sizing, but I would confidently state the following: Brown's Law Of Tire Sizing: If two tires are marked with sizes that are mathematically equal, but one is expressed as a decimal and the other as a fractionthese two tires will not be interchangeable.
Dishonesty in Sizing Competitive pressures have often led to inaccuracy in width measurement. Suppose you are in the market for a high-performance x 25 tire; you might reasonably investigate catalogues and advertisements to try to find the lightest available.
If the Pepsi Tire Company and the Coke Tire Company had tires of equal quality and technology, but the Pepsi was actually a marked as a 25, the Pepsi tire would be lighter than the accurately-marked Coke This would put Pepsi at a competitive advantage.
In self defense, Coke would retaliate by marketing an even lighter labeled as a This scenario prevailed throughout the '70's and '80's.Math Lesson 51 Writing Fractions as Decimals.
STUDY. PLAY. repeating decimal. A decimal in which one or more digits repeat infinitely.
Any fraction can be written as a decimal using division. Decimals like and are terminating decimals because the division ends, or terminates, when the remainder is zero. MORE FRACTIONS WORKSHEETS Fraction Addition Fraction Circles Fraction Circles Template Fraction Model Fraction Subtraction Fractions – Coloring Fractions – Comparing Fractions – Equivalent Fractions – Halves Convert between percents, fractions and decimals - W.
Writing Fractions and Decimals The focus of this printable math worksheet is to compare fractions and decimals. Students convert fractions to decimals and vice versa; use a number line if this exercise is too difficult for some children.
84 Chapter 2 Multiplying and Dividing Fractions When you write a terminating decimal as a fraction, what type of denominator do you get? Writing Decimals as Fractions Work with a partner.
Copy and complete the table. LESSON 1: Fractions as Quotients - Using Long Division to Convert a Fraction to a Decimal; LESSON 2: Finding the Distance Between Integers On a Number Line; Writing as under 8/9 as will help more clearly understand.
Identifying and writing decimals - thousandths Sub-menu All Place Value 13 Rounding - To Nearest 10 - To Nearest - To Nearest - Larger Numbers Understanding Place Value More on Place Value Comparing Numbers Skip Counting With Decimals Decimals - Tenths Decimals - Hundredths Decimals - Thousandths.