Sri LankaGrade 6 Sri Lanka School Math Circumference of a Circle
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Master this topic as part of Mensuration
1.2.1. Successor of a Number
1.2.2. Predecessor of a Number
1.3. n Digit Numbers
1.4. Place of a Digit
1.6.1. Addition of Large Numbers
1.6.2. Subtraction of Large Numbers
1.6.4. Division of Large Numbers
1.7. Rounding Numbers
1.7.1. Rounding off numbers
1.7.1.1. Rounding off to the nearest ten
1.7.1.2. Rounding off to the nearest hundred
1.7.1.3. Rounding off to the nearest thousand
1.7.2. Estimating Sum
1.7.3. Estimating Difference
1.7.4. Estimating Products
1.7.5. Estimating Quotients
3.2.1.1. Addition of Whole Numbers
3.2.1.3. Solving Magic Square
3.2.2. Subtraction of Whole Numbers
3.2.2.2.1. Multiplication of Whole Numbers
3.2.2.2.3. Division of Whole Numbers
3.2.2.2.4. Properties of Division of Whole Numbers
3.2.2.3. Word Problems on Whole Numbers
4. Integers
4.4. Comparing Integers
4.6.1.1. Addition of Integers
4.6.1.3. Properties of Addition of Integers
4.6.2. Subtraction of Integers
4.6.2.3.1. Multiplication of Integers
4.6.2.3.2. Properties of Multiplication of Integers
4.6.2.3.3. Division of Integers
4.6.2.3.4. Properties of Division of Integers
4.6.2.4. Mixed Operations on Integers
4.6.2.5. Word Problems on Integers
5.3. Types of Numbers
5.3.1. Odd and Even Numbers
5.3.2. Prime and Composite Numbers
5.3.2.2. Composite Numbers
5.3.2.3. Prime Numbers
5.3.3. Twin Primes
5.3.4. Prime Triplet
5.3.5. Co-Primes
5.3.6. Perfect Numbers
5.3.7. Tests of Divisibility
5.3.7.1. Test Divisibility by 2
5.3.7.2. Test Divisibility by 3
5.3.7.3. Test Divisibility by 4
5.3.7.4. Test Divisibility by 5
5.3.7.5. Test Divisibility by 6
5.3.7.6. Test Divisibility by 7
5.3.7.7. Test Divisibility by 8
5.3.7.8. Test Divisibility by 9
5.3.7.9. Test Divisibility by 10
5.3.7.10. Test Divisibility by 11
5.3.9. HCF and LCM
5.3.9.1. HCF (Highest Common Factor)
5.4.1. Properties of LCM and HCF
5.4.2. Word problems on HCF and LCM
6. Fractions
6.6. Unit Fraction
6.8. Equivalent Fractions
6.10. Comparing Fractions
6.10.1. Comparing Like Fractions
6.10.3. Comparing Unlike Fractions
6.11. Operations on Fractions
6.11.1. Addition of Fractions
6.11.1.1. Addition of Like Fractions
6.11.1.2. Addition of Unlike Fractions
6.11.1.3. Addition of Mixed Fractions
6.11.1.4. Word Problems on Addition of Fractions
6.11.2. Subtraction of Fractions
6.11.2.1. Subtraction of Like Fractions
6.11.2.2. Subtraction of Unlike Fractions
6.11.2.3. Subtraction of Mixed Fractions
7. Decimals
7.3. Place Value Chart
7.6. Equivalent Decimals
7.7. Comparing Decimals
7.8. Ordering Decimals
7.9.1.1. Convert Decimals to Proper Fractions
7.9.1.3. Convert Decimals to Mixed Fractions
9.1. Ratio
9.1.1. Terms of a Ratio
9.1.2. Equivalent Ratio
9.1.3. Ratio in the Simplest Form
9.1.5. Comparison of Ratios
9.1.6. Word Problems on Ratio
10. Unitary Method
11.2. Variables and Constants
13. Mensuration
14. Geometry
14.3. Types of Lines
14.3.1. Parallel Lines
14.3.2. Perpendicular Lines
14.4. Intersecting Lines
14.4.1. Identifying the Type of Line
14.4.3. Angle
14.4.3.1. Introduction to Angles
14.4.3.2. Interior and Exterior of An Angle
14.4.3.4. Types of an Angles
14.4.3.5. Measuring an Angle by a Protractor
14.4.4. Triangles
14.4.4.1. Introduction to Triangles
14.4.4.2. Congruent Triangles
14.4.4.3. Interior and Exterior of a Triangle
14.4.4.5. Types of Triangles by Angles
14.4.4.6. Count the Number of Triangles
14.4.4.7. Angle Sum Property of a Triangle
14.4.5. Curve
14.4.5.1. Straight and Curved Lines
14.4.5.2. Open Curve
14.5. Closed Curve
14.5.1. Simple Closed Curve
14.5.3. Polygon
14.5.3.1. Understanding Polygons
14.5.3.2. Name the Polygon
14.5.4. Quadrilateral
14.5.4.1. Introduction to Quadrilaterals
14.5.4.2. Convex and Concave Quadrilaterals
14.5.4.3. Interior and Exterior of a Quadrilateral
14.5.4.4. Angle Sum Property of a Quadrilateral
14.5.4.5. Special Types of Quadrilateral
14.5.5. Circle
14.5.5.1. Interior and Exterior of a Circle
14.5.5.2. Terms related to a Circle
14.5.5.4. Concentric Circles
16. Linear Symmetry
17. Data Handling
17.3. Pictographs
17.4. Bar graphs
17.4.1. Drawing Bar Graphs
17.4.2. Interpreting Bar Graphs
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