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Revision Notes

Decimal Fractions — Revision Notes

ICSE · Class 7 · Mathematics

Decimal Fractions revision notes for ICSE Class 7 Mathematics: 4 topics in quick points. Part of the ICSE Class 7 Mathematics syllabus.

44 questions30 flashcards2 formulas & key relations5 concepts

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Key Topics to Revise

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1. Meaning of Decimal Fractions

  • A decimal fraction is a fraction whose denominator can be expressed as 10 or some higher power of 10.
  • A decimal point is used to show the absence of the written denominator.
  • If there is no number to the left of the decimal point, a zero is generally written.
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2. Place Value and Decimal Places

  • The first place to the right of the decimal point is the tenths' place.
  • The second place to the right of the decimal point is the hundredths' place.
  • The number of figures following the decimal point is called the number of decimal places.
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3. Converting Between Fractions and Decimals

  • To convert a decimal to a fraction, remove the decimal point and write as many zeroes in the denominator as digits in the decimal part, then simplify.
  • To convert a fraction with denominator 10, 100, 1000, and so on into a decimal, place the decimal point after as many digits of the numerator from the right as there are zeroes in the denominator.
  • If the denominator is not 10, 100, 1000, and so on, divide normally and place the decimal point in the quotient after the unit digit division is completed.
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4. Addition and Subtraction of Decimals

  • In addition and subtraction, decimal points must be written in the same vertical line.
  • Digits with the same place value must be arranged one below the other.
  • Empty places may be filled with zeroes.

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Full Notes

Key Concepts

A decimal fraction or decimal numberA decimal point is the dotThe first place to the rightLike decimals have the same numberTo convert a decimal to

Frequently Asked Questions

What are the important topics in Decimal Fractions for ICSE Class 7 Mathematics?
Key topics in Decimal Fractions include Meaning of Decimal Fractions, Place Value and Decimal Places, Converting Between Fractions and Decimals, Addition and Subtraction of Decimals. Study these first, then practise questions on each for Class 7 exams.
How should I revise Decimal Fractions for Class 7 exams?
Learn the core ideas first, then work through the 44 practice questions on Decimal Fractions. Revise definitions regularly and use flashcards for quick recall before the exam.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

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All ICSE Class 7 Mathematics Revision Notes

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