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YOU are better than YOU think. Show yourself how:
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-/[]\- Logic chapters 1 to 5 re- appear not in sequence, as is or longer, in Volume 1A, Pattern Based Reason, Bon Appetite. Logic
Mastery Logic mastery makes the hard, easier. Logic mastery leads to better, stronger and richer comprehension. Logic mastery improves reading and writing. Logic mastery ease learning difficulties. Logic mastery gives a headstart. In sum, logic mastery will develops critical thinking, improve reading and writing, and give a firmer base for work and studies at many levels. Good luck. After logic, (a) continue reading Three Skills for Algebra, chapters 8 to 14 and do so alongside site area on solving liinear Equations ; or (b) see this calculus starter lesson and Volume 3, Why Slopes & More Math, chapters 2 to 6;
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-/[]\- What may be learnt and when depends on how skills and concepts are developed. Making the hard easier and clearer will allow earlier & richer development of skills and concepts. Try the Twiddla
Whiteboard. In principle, it allows
to people to draw and chat together online on a copy of this webpage or a clean
sheet. The chat may be via text or audio. Visit www.twiddla.com
to set up whiteboards to work with the webpage of your choice. |
1 A Definition of Real NumbersUnsigned Real Numbers
We assume each finite and infinite decimal expansion gives the length p of a line segment with one end at the origin of a half-line where the segment is a multiple p of a unit length. If p is an unsigned real number, it may be identified with a point on a half-line:
Here finite decimal expansions give decimal fractions; repeating decimal expansions give or correspond to whole numbers or simple fractions; and non-repeating decimal expansions correspond to all other points, numbers or line segment lengths. Real Numbers with SignsIf p is an unsigned real number, we put +p = p. It may be identified with a point on a half-line as above. Now on infinite line where 0 is identified with a point, a point to be called the origin, the line is divided into two parts. The selection of unit length, and a positive direction allows the use of unsigned real numbers p and positive real number +p = p (by definition) as coordinates on one side of the origin.
The use of negative real number -p = as coordinates on the other side of the origin - the negative side. A negative number n = -p is given by the negative sign prefix - before an unsigned number p.
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