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THE LEARNING STUDIO · MATHS, MADE CLEAR

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Standard 4Mathematics

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Standards 1–12 books522 working toolsNo account needed
STANDARD 9 PRACTICE0 / 15 topics

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India · Standard 4View curriculum reference
STANDARD 4 · FORMULA TO ANSWER

Fractions, ratio & percentage

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Mathematics

Fraction arithmetic

Fraction arithmetic: use first numerator, first denominator, operation. Review the formula, worked example and calculation steps.

Inputs

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RESULT
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Formula & explanation
a/b ± c/d = (ad ± bc)/bd; a/b × c/d = ac/bd; a/b ÷ c/d = ad/bc

Variables & units

First numerator
Numeric value · minimum -1000000, maximum 1000000
First denominator
Numeric value · minimum 1, maximum 1000000
Operation
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Second numerator
Numeric value · minimum -1000000, maximum 1000000
Second denominator
Numeric value · minimum 1, maximum 1000000

Worked example

1/2 + 1/3 = 5/6 ≈ 0.833333.

Assumptions

Whole-number numerators and positive denominators. The steps show the exact reduced fraction; the headline shows a rounded decimal.

Formula version 1.0.0. JavaScript floating-point arithmetic applies. Results display up to 6 decimal places; stored values retain available precision. Use the units shown.

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NCERT/CBSE references. Topic selections are curated practice; board, edition and year requirements vary. These are suggested topic collections, including related practice and enrichment; they are not exhaustive syllabus mappings, university endorsements, or complete exercise solutions. All public calculators stay available to every learner.

Books and source materials
Clear sources. Original explanations.

Source review: 2026-11-02. Book titles follow the NCERT publication list. Class 9 topic alignment uses the CBSE 2026–27 curriculum. Publisher sites can update editions and may occasionally be unavailable.