NCERT - 7 - Maths :: Fractions and Decimals

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Go To: NCERT-Mathematics-Grade 7

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Course Content / Subtopic list:


  1. Recall Fractions
  2. Multiplication Of Fractions
  3. Division Of Fractions
  4. Recall Decimal Numbers, Multiplication Of Decimal
  5. Division Of Decimal Numbers

Lesson Plan

[contributor- Kripa S]


Objective: To revisit basics of fractions and decimals, apply operations on fractions and decimals

Subtopics to be covered:

- Types of Fractions, arrange in order, compare fractions

- Add, Subtract Fractions

- Multiply, Divide fractions

- Place value of digits in decimal system, write decimal number in standard form and expanded form

- Add, subtract Decimal numbers

- Multiply, Divide decimals

Learning Outcome:

- Students can identify, simplify fractions and decimals and arrange a given set in required order

- Students can perform the 4 operations on fractions and decimals



Videos

[Contributors - Kripa S, Rishi Mazumdar]


https://hi.khanacademy.org/math/in-seventh-grade-math/fractions-decimals (Khan Academy)

https://www.youtube.com/watch?v=C3U8WDVniGc ( What is Fraction, How to find fraction of whole object )

https://www.youtube.com/watch?v=1thX9Qml0Ks&t=10s (Addition of Fractions)

https://www.youtube.com/watch?v=QjaF8xZLBjQ (Subtraction of Fractions)

Images

[Contributor- Kripa S]


https://image.slidesharecdn.com/typesoffractions-100405235536-phpapp01/95/types-of-fractions-1-728.jpg?cb=1270511757 (types of fraction)

http://images.reallygreattoys.com/product/CD5918.jpg (comparing fractions)

http://commonthreads.typepad.com/.a/6a00d83516641653ef017d3cb00b6a970c-pi (equivalent fractions)

https://media.gcflearnfree.org/ctassets/topics/231/half-measuring-cup3.png (fraction to decimal)

https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcS6Hdzl-2V-6bEQVSwNk34a6lFM1mp8CQiVaMw3YNMPS-kPoUI99Q (compare decimals)

Activities

[Contributor- Kripa S]


1. Take a cardpaper piece and draw a circle of any radius of your choice. Divide the circle into 8 equal parts. Shade each portion with a different colour (yellow, orange, red, pink, green, blue, violet, dark colour). Push a pen refill or a stick and rotate the sheet. See the colour of the rotating sheet and discuss why you see that colour.

2. Make teams of 4 students. Each team must draw a circle and divide it in 12 equal parts. Each team must make chits of paper and write these fractions : 1/12, 2,12,3/12,4/12,5/12,6/12.....11/12,1/2,1/3,1/4,1/6. Shuffle these chits. One students picks out one chit and shades those many parts of circle. Then the next student will pick out another chit and shade those many parts. Repeat this step till the circle is fully shaded. The team which shades the circle first wins.

3. A game between two teams. One team will tell a measurement of length or weight in m/ g and other team has to tell the measurement in km/ kg with proper decimals.

Additional Aids

[Contributor- Trisha Srivastava]


https://drive.google.com/open?id=0BzNF2YyqQxJ-eTVsaTl1MFc5aDQ (answerkey 1)

https://drive.google.com/open?id=0BzNF2YyqQxJ-bmNldFlrMy0tMUE (answerkey 2)

Transliteration

[Contributor - Fathima Nazar]

Term Transliterated Term Translated Term
fractions फ्रैक्शंस भाग
decimals देसिमलस दशमलव
numerator नुमेरटर अंश
denominator डिनोमिनेटर भाजक, हर
reciprocal रेसिप्रोकाल पारस्परिक

Worksheets

[Contributor - Trisha Srivastava]

https://drive.google.com/open?id=0BzNF2YyqQxJ-MzdyT1I3bjN2a0k (Worksheet 1)

https://drive.google.com/open?id=0BzNF2YyqQxJ-S2dZZXFHdkdxd2s (Worksheet 2)


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