NCERT - 8 - Maths :: Rational Numbers

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Go To: NCERT-Mathematics-Grade 8

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Course Content / Subtopic list:


  1. Properties Of Rational Number
  2. Representation Of Rational Number On The Number Line

Lesson Plan


[Author - Kripa S]


Objective: Introduce rational numbers and properties of rational numbers

Subtopics to be covered:

- Define rational numbers

- Properties of rational numbers for the 4 operations (+, -, x, ÷)

- Additive inverse, Multiplicative inverse of a rational number

Learning Outcome:

- Students can identify the properties of a rational number based on any operation

- Students can solve problems on rational numbers (+, -, x, ÷)



Videos

[Author - Kripa S, Rishi Mazumdar]


https://www.youtube.com/watch?v=9yvtLN_24G0 (Rational numbers - animated, English)

https://hi.khanacademy.org/math/in-math-by-grade/in-seventh-grade-math/in-seventh-grade-math/rational-numbers (Rational Numbers - Hindi)

https://hi.khanacademy.org/math/in-math-by-grade/in-eighth-grade-math/rational-numbers-1 (Khan Academy)


Images

[Author - Kripa S]


http://4.bp.blogspot.com/_6c3ihz9hDWY/TPJsBrhS1JI/AAAAAAAAAAs/4jIhQR7xfYk/s1600/Rational+numbers.png (Rational Numbers)

'https://img.clipartfox.com/4260a4c3b12568c478b2a135136b9bbb_relationship-between-numbers-rational-numbers-definition_500-387.png (examples on rational numbers)

https://s3-ap-southeast-1.amazonaws.com/learnhive/lcards/Rational-Numbers-5220428eec40a.png (properties of rational numbers)


Activities

[Author - Kripa S]


1. Make two teams. One team will write a number on board, and other team will guess whether it is a rational number or not.

2. Make a chart of how rational numbers consists of integers, whole numbers, natural numbers.


Additional Aids

[Author - Jyoti Joshi, Dr Nikitha Narayan, Gaurav Sharma]


https://drive.google.com/open?id=0BzNF2YyqQxJ-bUU2NzZybko4Q1U (answerkey 1)

https://drive.google.com/open?id=0BzNF2YyqQxJ-dTZxbklmZVJhZUE (Answer Key 2)

https://drive.google.com/open?id=0BzNF2YyqQxJ-NkZqU0Q2TmhFRVE (Answer Key 3)

Transliteration

[Author - Shachi Patel]

Term Transliterated Term Translated Term
natural number नेचुरल नंबर प्राकृतिक संख्या
integer इन्टिजर पूर्णांक
whole number होल नंबर पूर्ण संख्या
associative अस्सोसिएटिव जोड़नेवाला
commutative कंम्यूटेटिव विनिमेय
inverse इनवर्स श्लोक में
reciprocal रेसिप्रोकल पारस्परिक
number Line नंबर लाइन संख्या रेखा
distributive डिस्ट्रिब्यूटिव विभाजित करनेवाला

Worksheets

[Author - Jyoti Joshi, Dr Nikitha Narayan, Gaurav Sharma]


https://drive.google.com/open?id=0BzNF2YyqQxJ-YnNwWW82aDNnbXM (worksheet 1)

https://drive.google.com/open?id=0BzNF2YyqQxJ-VUkxR0tGVnUtWkk (Worksheet 2)

https://drive.google.com/open?id=0BzNF2YyqQxJ-TXpzOGFMakpObjQ (Worksheet 3)


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