India's #1 AI Tutorchapter-deep · Mathematics · Chapter 7
CBSE Class 6 Mathematics — Fractions: complete chapter guide
CBSE Class 6 Mathematics Chapter 7 Fractions is where arithmetic evolves from whole numbers into the richer world of rational numbers. Every CBSE Class 6 student encounters fractions when dividing a pizza, measuring ingredients, or reading a clock, yet Chapter 7 formalises these intuitions into rigorous methods recognised by the NCERT syllabus. This chapter teaches students to classify fractions as like or unlike, generate infinitely many equivalent fractions, compare and order any set of fractions, perform addition, subtraction, multiplication, and division, plot fractions on a number line, and express fractions as decimals. Mastery here is non-negotiable: the 2024–25 CBSE Class 6 annual exam allocates roughly 12–15 marks to fractions, and every subsequent class builds on these foundations.
Your child's private AI tutor — trained on NCERT.
3-day free trial · ₹1 to start · Cancel anytime.
Start 3-day free trial →What CBSE Class 6 Mathematics Chapter 7 Fractions Covers — NCERT Structure
CBSE Class 6 Mathematics Chapter 7 Fractions is structured into six major topics as per the latest NCERT textbook for 2024–25. The chapter opens with the distinction between like and unlike fractions, explaining that like fractions share a common denominator while unlike fractions do not. Next, students learn equivalent fractions — the idea that 1/2, 2/4, 3/6, and 4/8 all represent the same value. The third section addresses comparing and ordering fractions, which becomes non-trivial when denominators differ. The fourth and most substantial section covers operations: adding and subtracting fractions (separately for like and unlike cases), multiplying fractions, and dividing one fraction by another. The fifth topic places fractions on a number line, reinforcing their position as numbers between integers. Finally, the chapter introduces decimal representation, showing that every fraction can be written as a terminating or repeating decimal by performing division. Each topic is scaffolded with NCERT worked examples, and the exercise set at the end contains roughly 35–40 problems across varying difficulty levels.
- Like fractions: same denominator, e.g. 2/7 and 5/7
- Unlike fractions: different denominators, e.g. 1/3 and 2/5
- Equivalent fractions: same value, different forms, e.g. 3/4 = 6/8 = 9/12
- Comparing fractions: convert to common denominator using LCM
- Operations: addition, subtraction, multiplication, division
- Number line: visual placement of fractions between whole numbers
- Decimal form: divide numerator by denominator to get decimal
Like and Unlike Fractions — Definition and Why They Matter
In CBSE Class 6 Mathematics Chapter 7 Fractions, like fractions are those with identical denominators, such as 3/11, 7/11, and 10/11. Unlike fractions have different denominators, for instance 2/3, 5/8, and 7/12. This classification is critical because the algorithm for adding or subtracting fractions depends entirely on whether they are like or unlike. With like fractions, you simply add or subtract the numerators and retain the common denominator: 3/11 + 7/11 = (3+7)/11 = 10/11. For unlike fractions, you must first convert them into equivalent fractions with a common denominator — usually the least common multiple of the original denominators — before performing the operation. NCERT introduces this early because parents report that children often mistakenly add both numerators and denominators (e.g. incorrectly writing 1/2 + 1/3 as 2/5), a conceptual error that persists if the like/unlike distinction is not emphasised. Mastering this distinction in CBSE Class 6 Mathematics Chapter 7 Fractions prevents cascading mistakes in algebra and ratio problems in Classes 7 and 8.
Equivalent Fractions — How to Generate and Verify Them
CBSE Class 6 Mathematics Chapter 7 Fractions defines equivalent fractions as fractions that represent the same value even though their numerators and denominators differ. The NCERT method for generating equivalent fractions is to multiply (or divide) both the numerator and the denominator by the same non-zero integer. For example, starting with 2/3, multiply both terms by 2 to get 4/6, by 3 to get 6/9, by 4 to get 8/12, and so on — all equivalent to 2/3. Conversely, to simplify a fraction, divide both numerator and denominator by their greatest common divisor (GCD). For instance, 18/24 can be simplified by dividing both by 6, yielding 3/4. Verification is straightforward: cross-multiply. If a/b and c/d are equivalent, then a×d must equal b×c. This cross-multiplication check appears frequently in CBSE Class 6 annual exams. Students should practice generating at least five equivalent fractions for any given fraction and simplifying any fraction to its lowest terms, as these skills underpin comparing, ordering, and operating on fractions throughout the chapter.
- Multiply both numerator and denominator by the same integer to scale up
- Divide both by their GCD to simplify to lowest terms
- Cross-multiplication test: a/b = c/d if and only if a×d = b×c
- Equivalent fractions have infinite representations: 1/2 = 2/4 = 3/6 = 4/8 = …
- Simplest form (lowest terms) uses GCD; NCERT expects answers in simplest form unless stated otherwise
Comparing and Ordering Fractions — The LCM Method
When CBSE Class 6 Mathematics Chapter 7 Fractions asks students to compare 3/5 and 4/7, the direct comparison is impossible because the denominators differ. The NCERT-prescribed method is to convert both fractions to equivalent fractions with a common denominator, ideally the least common multiple of the original denominators. For 3/5 and 4/7, LCM(5,7)=35. Convert: 3/5 = 21/35 and 4/7 = 20/35. Now compare numerators: 21 > 20, so 3/5 > 4/7. To order a set of fractions such as 2/3, 5/6, and 7/9, find LCM(3,6,9)=18. Convert each: 2/3=12/18, 5/6=15/18, 7/9=14/18. Arrange by numerator: 12 < 14 < 15, hence 2/3 < 7/9 < 5/6. This algorithm is tested in 3–4 questions per CBSE Class 6 annual exam, and students lose marks when they forget to simplify the common denominator or miscalculate the LCM. Practising LCM calculation for pairs and triples of numbers is therefore essential preparation for CBSE Class 6 Mathematics Chapter 7 Fractions.
Adding and Subtracting Like Fractions — Simple Case
CBSE Class 6 Mathematics Chapter 7 Fractions teaches that adding or subtracting like fractions is the simplest operation: keep the denominator unchanged and add (or subtract) the numerators. For example, 5/13 + 7/13 = (5+7)/13 = 12/13. Similarly, 11/15 − 4/15 = (11−4)/15 = 7/15. NCERT emphasises that students must always simplify the result. If the sum or difference yields a fraction that can be reduced, do so immediately. For instance, 3/8 + 5/8 = 8/8 = 1. This process appears straightforward, yet parents report that children sometimes add denominators by mistake, writing 3/8 + 5/8 as 8/16 instead of 8/8. Reinforcing the rule — 'same denominator stays, numerators combine' — prevents this error. CBSE annual exams typically include 2–3 direct questions on adding and subtracting like fractions, often embedded in word problems such as 'Ravi ate 2/9 of a cake and Priya ate 3/9; what fraction did they eat together?' Mastery here builds confidence for the more complex unlike-fraction operations covered next in CBSE Class 6 Mathematics Chapter 7 Fractions.
Adding and Subtracting Unlike Fractions — The Common Denominator Strategy
Unlike fractions require conversion to like fractions before addition or subtraction can proceed. CBSE Class 6 Mathematics Chapter 7 Fractions provides a three-step algorithm: (1) find the LCM of the denominators, (2) convert each fraction to an equivalent fraction with that LCM as the new denominator, (3) add or subtract the numerators and simplify. Consider 1/4 + 1/6. LCM(4,6)=12. Convert: 1/4=3/12 and 1/6=2/12. Add: 3/12+2/12=5/12. For subtraction, take 5/6 − 1/4. LCM(6,4)=12. Convert: 5/6=10/12 and 1/4=3/12. Subtract: 10/12−3/12=7/12. NCERT devotes several worked examples to this process because it is the single largest source of errors in CBSE Class 6 exams. Common mistakes include using a common multiple that is not the least (leading to unnecessarily large numbers), forgetting to convert one of the fractions, and failing to simplify the final answer. Regular practice with varied denominators — primes, composites, and co-primes — ensures fluency. Parents can support learning by asking their child to verbalise each step aloud, reinforcing the procedural sequence until it becomes automatic.
- Step 1: Compute LCM of both denominators
- Step 2: Convert each fraction using LCM as new denominator
- Step 3: Add or subtract numerators; keep new denominator
- Step 4: Simplify result to lowest terms
- Common error: adding/subtracting denominators directly — never do this
Multiplying Fractions — Numerator Times Numerator, Denominator Times Denominator
CBSE Class 6 Mathematics Chapter 7 Fractions introduces multiplication with an elegantly simple rule: multiply the numerators together to get the new numerator, and multiply the denominators together to get the new denominator. For example, (2/5) × (3/7) = (2×3)/(5×7) = 6/35. If the result can be simplified, do so: (4/9) × (3/8) = 12/72 = 1/6 after dividing both by 12. NCERT recommends cross-cancelling before multiplying to avoid large numbers. In (4/9)×(3/8), cancel the 4 and 8 (both divisible by 4) to get (1/9)×(3/2), then cancel 3 and 9 (both divisible by 3) to get (1/3)×(1/2)=1/6 directly. This technique, while not mandatory, significantly reduces arithmetic load and is appreciated in timed exams. Multiplying a fraction by a whole number is a special case: treat the whole number as a fraction with denominator 1. For instance, 5 × (2/7) = (5/1) × (2/7) = 10/7, which can be written as the mixed number 1 and 3/7. CBSE Class 6 annual exams typically include 2–3 multiplication problems, some involving whole numbers, and one or two word problems such as 'Find 3/4 of 16 kg' (interpreted as (3/4)×16).
Dividing Fractions — Multiply by the Reciprocal
Division of fractions in CBSE Class 6 Mathematics Chapter 7 Fractions is recast as multiplication by the reciprocal. To divide (2/3) by (5/7), multiply (2/3) by the reciprocal of (5/7), which is (7/5): (2/3) ÷ (5/7) = (2/3) × (7/5) = 14/15. The reciprocal of a fraction a/b is b/a, obtained by swapping numerator and denominator. NCERT provides the mnemonic 'Keep–Change–Flip': keep the first fraction, change division to multiplication, flip the second fraction. For example, (3/4) ÷ (2/9) becomes (3/4) × (9/2) = 27/8 = 3 and 3/8. Dividing a fraction by a whole number also uses reciprocals: (5/6) ÷ 2 = (5/6) × (1/2) = 5/12. Dividing a whole number by a fraction: 3 ÷ (2/5) = (3/1) × (5/2) = 15/2 = 7 and 1/2. This operation appears in 2–3 questions per CBSE Class 6 exam, often in contexts like 'How many pieces of length 1/4 m can be cut from a 5 m rope?' which translates to 5 ÷ (1/4). Students must recognise the division structure and apply the reciprocal rule confidently, as computational errors here lose easy marks.
- Reciprocal of a/b is b/a (swap numerator and denominator)
- Division rule: (a/b) ÷ (c/d) = (a/b) × (d/c)
- Mnemonic: Keep–Change–Flip
- Always simplify the result after multiplication
- Word problems often disguise division: 'how many 1/3 cups in 2 cups?' means 2 ÷ (1/3)
Fractions on the Number Line — Visual Representation and Placement
CBSE Class 6 Mathematics Chapter 7 Fractions dedicates a section to plotting fractions on the number line, reinforcing that fractions are numbers with definite positions between whole numbers. To plot 3/4, divide the segment from 0 to 1 into four equal parts and mark the third division point. To plot 7/4, note that 7/4 = 1 and 3/4, so it sits between 1 and 2, three-quarters of the way from 1 to 2. NCERT illustrates both proper fractions (numerator < denominator, lying between 0 and 1) and improper fractions (numerator ≥ denominator, lying at or beyond 1). This visual skill helps students understand equivalence: 2/4 and 1/2 occupy the same point. It also clarifies ordering: if 3/5 is to the left of 4/5 on the number line, then 3/5 < 4/5. CBSE exam questions may ask 'Represent 5/6, 1/2, and 2/3 on a number line and arrange them in ascending order' or 'Mark 11/8 on the number line.' Practising with different denominators and converting improper fractions to mixed numbers before plotting ensures accuracy. Many students find the number line intuitive, and parents report that visual practice reduces abstract confusion around fraction magnitude.
Converting Fractions to Decimals — Division Algorithm
CBSE Class 6 Mathematics Chapter 7 Fractions concludes with decimal representation, teaching students that every fraction can be expressed as a decimal by dividing the numerator by the denominator. For 3/4, divide 3.000 by 4 to get 0.75. For 1/8, divide 1.000 by 8 to get 0.125. Some fractions yield terminating decimals (the division ends), while others yield repeating decimals (a digit or group repeats indefinitely), such as 1/3 = 0.333… NCERT focuses on terminating decimals at the Class 6 level, leaving repeating decimals for Class 7. Students should be comfortable performing long division with decimals, a skill that recurs in percentage and ratio problems in later classes. CBSE annual exams may include 1–2 questions like 'Express 7/20 as a decimal' or 'Which is greater: 0.6 or 5/8?' (convert 5/8 to 0.625 and compare). Mastery of this conversion bridges fractions and decimals, two representations of the same rational number, and prepares students for Class 7 topics such as percentage and direct proportion.
Common Mistakes in CBSE Class 6 Mathematics Chapter 7 Fractions — and How to Avoid Them
Parents and teachers observe recurring errors in CBSE Class 6 Mathematics Chapter 7 Fractions that cost students marks in the annual exam. The most frequent mistake is adding or subtracting denominators along with numerators, for example writing 1/2 + 1/3 as 2/5. This stems from misunderstanding the meaning of the denominator and the necessity of a common denominator. Second, students forget to simplify final answers, leaving 6/9 instead of 2/3. NCERT answer keys always show simplified fractions, and examiners deduct marks for unsimplified results. Third, when multiplying or dividing, students sometimes cross-cancel incorrectly, cancelling a numerator from one fraction with a numerator from another, rather than with a denominator. Fourth, plotting fractions on the number line without converting improper fractions to mixed numbers leads to misplacement. Fifth, in word problems, students struggle to translate English phrases like 'two-thirds of' into the operation (2/3) ×. Regular practice, step-by-step working, and verbalising the algorithm aloud all reduce these errors. Mock tests using previous years' CBSE question papers help identify individual weak spots before the final exam.
- Never add/subtract denominators directly — always find common denominator first
- Always simplify the final answer to lowest terms
- Cross-cancellation applies only between a numerator of one fraction and a denominator of another
- Convert improper fractions to mixed numbers for number line placement
- Translate 'of' in word problems to multiplication, e.g. 'half of 10' means (1/2)×10
Exam Weightage and Question Patterns in CBSE Class 6 Mathematics Chapter 7 Fractions
CBSE Class 6 Mathematics Chapter 7 Fractions typically carries 12–15 marks in the annual examination, distributed across multiple question types. Expect 2–3 short-answer questions (2 marks each) on operations — addition, subtraction, multiplication, or division of two fractions. One question usually asks for comparison or ordering of three fractions. Another 2-mark question tests equivalent fractions: 'Find three fractions equivalent to 5/7.' Long-answer questions (3–4 marks) often combine operations, such as 'Simplify: (2/3 + 1/6) × 3/5 ÷ 1/2.' There is typically one word problem worth 3 marks, for instance 'A tank is 3/4 full. If 1/5 of the water is used, what fraction remains?' Number line representation appears as a 2-mark question: 'Represent 5/6 and 7/6 on the number line.' Decimal conversion may be tested in a 1- or 2-mark question. The 2024–25 CBSE sample paper for Class 6 Mathematics includes one fractions-based problem in the objective section (1 mark MCQ) and one in the subjective section (3 marks). To score full marks in CBSE Class 6 Mathematics Chapter 7 Fractions, students should solve all NCERT in-text examples, complete every exercise problem, and attempt at least three previous years' question papers under timed conditions.
How CBSETUTOR.ai Supports Mastery of CBSE Class 6 Mathematics Chapter 7 Fractions
Many Class 6 parents find that their child grasps the theory of fractions but stumbles during problem-solving, especially with unlike fractions or multi-step word problems. CBSETUTOR.ai is an AI tutor available 24×7 that has ingested the entire NCERT Class 6 Mathematics textbook, including every worked example and exercise in Chapter 7 Fractions. When a student uploads a photo of a fraction problem from their worksheet or asks 'How do I add 2/5 and 3/7?', CBSETUTOR.ai provides a step-by-step solution aligned exactly with NCERT methodology — finding the LCM, converting to equivalent fractions, and simplifying — rather than a one-line answer. The platform also generates unlimited practice problems targeting specific weak areas, such as comparing three unlike fractions or dividing a fraction by a whole number. Because CBSETUTOR.ai covers all CBSE subjects and all classes from 6 to 12 at a single subscription of ₹999 per month (with a 3-day free trial, no credit card required), parents gain a cost-effective alternative to multiple subject tutors. For CBSE Class 6 Mathematics Chapter 7 Fractions, the AI's ability to provide immediate, judgment-free explanations at any hour is particularly valuable during late-evening homework sessions or weekend revision.
- Instant step-by-step solutions for any CBSE Class 6 Mathematics Chapter 7 Fractions problem
- Aligned with NCERT textbook language and methodology
- Unlimited practice problem generation targeting weak topics
- Photo upload of worksheets for on-demand help
- Flat ₹999/month for all subjects and classes 6–12, 3-day free trial available
Practice Strategy for Scoring Full Marks in CBSE Class 6 Mathematics Chapter 7 Fractions
To excel in CBSE Class 6 Mathematics Chapter 7 Fractions, adopt a structured practice plan over four weeks before the annual exam. Week 1: Master like/unlike classification and equivalent fractions by solving all NCERT in-text examples and Exercise 7.1. Verify each equivalent fraction using cross-multiplication. Week 2: Focus on comparing and ordering fractions. Solve Exercise 7.2 completely, ensuring you can find the LCM for any pair of numbers under 30 without a calculator. Week 3: Tackle operations. Break practice into four mini-sessions: (a) adding like fractions, (b) adding unlike fractions, (c) multiplying fractions, (d) dividing fractions. Solve Exercise 7.3 and 7.4 methodically, always simplifying final answers. Week 4: Integrate all skills. Solve mixed problems and word problems from the NCERT exercise and previous years' CBSE papers. Practice number line representation and decimal conversion daily. On the final weekend, take a full-length mock test covering the entire Class 6 syllabus, allocating 12–15 minutes to fractions. Review mistakes immediately, focusing on where the algorithm broke down. This four-week cycle, combined with regular homework completion and doubt clarification (via a teacher, peer group, or AI tutor like CBSETUTOR.ai), ensures thorough preparation and confidence on exam day.