Fractions

Class 6 Mathematics · Ganita Prakash · Chapter 7

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  • Marks booster + cheatsheet: key concepts in 2 lines each, common traps
  • Primes and divisibility tests, Ch 5
  • Brahmagupta's fraction method, Ch 7
  • Common traps, corrected
  • Perimeter and area rules, Ch 6
  • Types of angles and the protractor, Ch 2
Page 1 free about 8 min read, Full kit about 55 min read
  • Marks booster + cheatsheet: key concepts in 2 lines each, common traps
  • Primes and divisibility tests, Ch 5
  • Brahmagupta's fraction method, Ch 7
  • Common traps, corrected
  • Perimeter and area rules, Ch 6
  • Types of angles and the protractor, Ch 2
Page 1 free about 8 min read, Full kit about 55 min read
View all 5 amazing Marks Booster kits →

Summary

This chapter develops fractions as equal shares. When one whole is divided into equal parts, each part is a fractional unit, such as \(\tfrac{1}{2}, \tfrac{1}{3}, \tfrac{1}{4}, \tfrac{1}{5}\); the more parts the whole is split into, the smaller each share, so \(\tfrac{1}{9} < \tfrac{1}{5}\). A fraction \(\tfrac{a}{b}\) has a numerator \(a\) and denominator \(b\), and fractions can be shown on the number line. The chapter explains equivalent fractions \u2014 different fractions that represent the same amount, such as \(\tfrac{1}{2} = \tfrac{2}{4} = \tfrac{3}{6}\) \u2014 obtained by multiplying or dividing numerator and denominator by the same number, and shows how to reduce a fraction to its simplest form. Fractions are compared by making denominators equal. Mixed numbers like \(2\tfrac{1}{3}\) are converted to and from improper fractions. Finally, the chapter teaches adding and subtracting fractions: like fractions are added directly, while unlike fractions are first rewritten with a common denominator. Real-life sharing situations with rotis and lengths run throughout to keep the meaning of fractions concrete.

Fractional Units and Equal SharesFractions on the Number LineEquivalent Fractions and Simplest FormComparing FractionsMixed and Improper FractionsAdding and Subtracting Fractions

Key terms

Fraction
A number \(\dfrac{a}{b}\) representing equal parts of a whole, with numerator \(a\) and denominator \(b\).
Fractional unit
One equal part of a whole, such as \(\tfrac{1}{2}, \tfrac{1}{3}\) or \(\tfrac{1}{4}\).
Numerator and denominator
In \(\dfrac{a}{b}\), \(a\) is the numerator (parts taken) and \(b\) is the denominator (equal parts of the whole).
Equivalent fractions
Different fractions that represent the same value, e.g. \(\tfrac{1}{2} = \tfrac{2}{4} = \tfrac{3}{6}\).
Mixed number
A number with a whole part and a fractional part, such as \(2\tfrac{1}{3}\).
Like fractions
Fractions having the same denominator, which can be added or subtracted directly.

Extra questions & answers

Figure it Out

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Do it once more! Fill in the blank boxes.

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Now, can you find the lengths of the various blue lines shown below? Fill in the boxes as well.

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Answer the following questions after looking at the fraction wall:

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Find equivalent fractions for the given pairs of fractions such that the fractional units are the same.

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Try one from this chapter
When one whole is divided into equal parts, each part is called a
Flashcards & interactive practice

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