TNSB - 8 - Maths :: Real number system
Go To: TNSB-Mathematics-Grade 8
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[Contributor - Kripa S]
Objective: Revisit Real numbers
Subtopics to be covered:
- Define rational numbers
- Properties of rational numbers based on addition, subtraction, multiplication, division
- Simplify numerical expressions involving 3 brackets
- Revise Exponents and laws of exponents
- Basic squares, square roots, cubes, cube roots
- Find square roots and cube roots by prime factorization method for a given number
Learning Outcome:
- Students can solve sums based on properties of rational numbers
- Students can solve sums on rational numbers involving 3 brackets
- Students can find square, square root, cube, cube root of a given number
[Contributor - Rini Jose]
https://drive.google.com/open?id=1Z60tu86LI0rMBQEGdgZKdu2aUMEvDjJK (English)
https://drive.google.com/open?id=11ML_XrvapKlfQ0J_LuurL6Egjk3r8sVH (Tamil)
[Contributor - Sumathi Sampath, Kamala Ramesh]
https://www.youtube.com/watch?v=vwFK8Jz_Zss (Exponents - Vetrivel Foundation)
https://www.youtube.com/watch?v=7Ua7lU3yuV0&feature=youtu.be (Tamil - Easy way to find squares)
[Contributor - Kripa S]
http://s2.thingpic.com/images/Fi/A35fanMCykPtZGD35jLj87i3.png (what are real numbers)
https://mathspace-production-media.mathspace.co/media/upload/images/9-surds/chapter-entry-rational-and-irrationals.png (examples of real numbers)
'http://3.bp.blogspot.com/_KHzog4bhr_0/TNgewweh7DI/AAAAAAAAAOQ/53ufgj7Io-M/s1600/fractions.gif (fraction from 1/10 to whole)
https://www.mathsisfun.com/algebra/images/exponent-8-2.svg (exponents)
http://www.coolmath.com/sites/cmat/files/images/01-exponents-definition-03.gif (example of exponents)
https://i0.wp.com/www.math-help-online.com/wp-content/uploads/2016/04/square-roots.jpg (square roots)
[Contributor - Kripa S]
1. Make two teams. One team will write a number on board, and other team will guess whether it is a real number or not.
2. Make a chart of how rational numbers consists of integers, whole numbers, natural numbers.
3. Make a chart of how real number system consists of both rational and irrational numbers.
[Contributor - Kripa Nagaraju]
https://drive.google.com/open?id=0BzNF2YyqQxJ-ek9tM0w0WEZibms (Answer Key 1)
https://drive.google.com/open?id=0BzNF2YyqQxJ-U1lGR3FaRVItdDQ (Answer Key 2)
[Contributor - Gayathri Arun]
| Term | Transliterated Term | Translated Term | |
| Rational Number | ரஷனல் நம்பர் | விகிதமுறு எண் | |
| Expression | எக்ஸ்ப்ரெஷன் | கோவை | |
| Exponents | எக்ஸ்பொன்டேன்ட் | அடுக்கு, | |
| Powers | பவர்ஸ் | அடுக்கு, | |
| Squares | ஸ்க்வெர்ஸ் | வர்க்கம் | |
| Square Roots | ஸ்க்வெர் ரூட்ஸ் | வர்க்கமூலம், இருபடி மூலம் | |
| Cubes | க்யூப்ஸ் | கனம் | |
| Cube Roots | க்யூப் ரூட்ஸ் | முப்படி மூலம் | |
| Approximation | அப்ரோக்ஸிமஷன் | தோராயமாக்கம் | |
| Simplify | சிம்பிளிபை | சுருக்குக | |
| Factorization | பாக்டரைசேஷன் | காரணியாக்க |
[Contributor - Kripa Nagaraju, Sudha Thangaraj]
https://drive.google.com/open?id=0B4m07xnDF8JpM01sUHhCWWZfQ3M (worksheet)
https://drive.google.com/open?id=0BzNF2YyqQxJ-Yk96UF9kR004ekE (Worksheet 1)
https://drive.google.com/open?id=0BzNF2YyqQxJ-ZHBndC1mMndhOEE (Worksheet 2)
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