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Grade 6
Mensuration
Perimeter of Polygons
Grade 6
1.
Large Numbers (7-Digit to 9-Digits)
1.1.
Representation of Large Numbers
1.1.1.
Write Large Numbers by Separating the Periods
1.1.2.
Write Numerals as Number Names
1.1.3.
Write Number Names as Numerals
1.1.4.
Relation Between Different Periods
1.1.5.
Numbers in Expanded Form
1.2.
Successor and Predecessor
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
1.5.
Compare Large Numbers
1.6.
Operations on Large Numbers
1.6.1.
Word Problem on Addition of Large Numbers
1.6.2.
Word Problem on Subtraction of Large Numbers
1.6.3.
Word Problem on Multiplication of Large Numbers
1.6.4.
Word Problem on Division of Large Numbers
1.6.5.
Word Problem on Mixed Operations
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
2.
Roman Numerals
2.1.
Introduction to Roman Numerals
2.2.
Write Roman Numerals for Natural Numbers
2.3.
Write Natural Numbers for Roman Numerals
2.4.
Meaningless Roman Numerals
2.5.
Compare Roman Numerals
2.6.
Operations on Roman Numerals
2.7.
Word Problems on Basic Arithmetic Using Roman Numerals
3.
Whole Numbers
3.1.
Introduction to Natural Numbers and Whole Numbers
3.2.
Operations on Whole Numbers
3.2.1.
Addition and Subtraction of Whole Numbers
3.2.1.1.
Addition of Whole Numbers
3.2.1.2.
Properties of Addition on Whole Numbers
3.2.1.3.
Solving Magic Square
3.2.1.4.
Subtraction of Whole Numbers
3.2.1.5.
Properties of Subtraction on Whole Numbers
3.2.2.
Multiplication and Division of Whole Numbers
3.2.2.1.
Multiplication of Whole Numbers
3.2.2.2.
Properties of Multiplication of Whole Numbers
3.2.2.3.
Division of Whole Numbers
3.2.2.4.
Properties of Division of Whole Numbers
3.2.3.
Word Problems on Whole Numbers
4.
Integers
4.1.
Introduction to Integers
4.2.
Representation of Integers on a Number Line
4.3.
Successor and Predecessor of an Integer
4.4.
Comparing Integers
4.5.
Absolute Value of an Integer
4.6.
Operations on Integers
4.6.1.
Addition and Subtraction of Integers
4.6.1.1.
Addition of Integers
4.6.1.2.
Addition of Integers on the Number Line
4.6.1.3.
Properties of Addition of Integers
4.6.1.4.
Subtraction of Integers
4.6.1.5.
Subtraction of Integers on the Number Line
4.6.1.6.
Properties of Subtraction of Integers
4.6.2.
Mixed Operations on Integers
4.6.3.
Word Problems on Integers
5.
Factors and Multiples
5.1.
Factors and Multiples of a Number
5.1.1.
Finding Factors of a Number
5.1.2.
Finding Multiples of a Number
5.1.3.
Word Problems on Factors and Multiples
5.1.4.
Properties of Factors and Multiples
5.1.5.
Types of Numbers
5.1.5.1.
Odd and Even Numbers
5.1.5.1.1.
Even numbers
5.1.5.1.2.
Odd numbers
5.1.5.1.3.
Properties of Odd and Even numbers
5.1.5.2.
Prime and Composite Numbers
5.1.5.2.1.
Understanding Prime and Composite Numbers
5.1.5.2.2.
Composite Numbers
5.1.5.2.3.
Prime Numbers
5.1.5.2.4.
Properties of Composite and Prime Numbers
5.1.5.3.
Twin Primes
5.1.5.4.
Prime Triplet
5.1.6.
Co-Primes
5.1.7.
Perfect Numbers
5.2.
Tests of Divisibility
5.2.1.
Test Divisibility by 2
5.2.2.
Test Divisibility by 3
5.2.3.
Test Divisibility by 4
5.2.4.
Test Divisibility by 5
5.2.5.
Test Divisibility by 6
5.2.6.
Test Divisibility by 7
5.2.7.
Test Divisibility by 8
5.2.8.
Test Divisibility by 9
5.2.9.
Test Divisibility by 10
5.2.10.
Test Divisibility by 11
5.3.
Prime Factorization of a Number
5.4.
HCF and LCM
5.4.1.
HCF (Highest Common Factor)
5.4.2.
LCM (Lowest Common Multiple)
5.4.3.
Properties of LCM and HCF
5.4.4.
Word problems on HCF and LCM
6.
Fractions
6.1.
Fraction and Fractional numbers
6.2.
Fractions on a Number Line
6.3.
Fraction as a Part of a Collection
6.4.
Fractional Part of a Collection
6.5.
Identifying Like and Unlike Fractions
6.6.
Unit Fraction
6.7.
Proper, Improper and Mixed Fractions
6.7.1.
Understand the Meaning of Proper, Improper and Mixed Fractions
6.7.2.
Convert Improper Fractions to Mixed Fractions
6.7.3.
Convert Mixed Fractions to Improper Fractions
6.8.
Equivalent Fractions
6.9.
Simplest Form of a Fraction
6.10.
Comparing Fractions
6.10.1.
Comparing Like Fractions
6.10.2.
Comparing Fractions with Same Numerator
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
6.11.2.4.
Word Problems on Subtraction of Fractions
6.11.3.
Addition and Subtraction of Fractions
6.11.3.1.
Simplify Expressions Involving Addition and Subtraction
6.11.3.2.
Word Problems on Addition and Subtraction of Fractions
7.
Decimals
7.1.
Introduction And Reading a Decimal Number
7.2.
Place Value Chart
7.3.
Expanded Form of Decimal Numbers
7.4.
Like, Unlike And Equivalent Decimals
7.5.
Ordering And Comparing Decimals
7.6.
Relate Decimals and Fractions
7.6.1.
Convert Decimals to Fractions
7.6.2.
Convert Fractions to Decimals
7.6.3.
Conversion of Metric Units using Decimals
7.7.
Addition and Subtraction of Decimals
7.7.1.
Addition of Decimals
7.7.2.
Subtraction of Decimals
7.7.3.
Mixed Operations on Decimals: Addition and Subtraction
7.7.4.
Word Problems on Addition and Subtraction of Decimals
7.8.
Multiplication and Division of Decimals
7.8.1.
Multiplication of Decimals
7.8.2.
Division of Decimals
7.8.3.
Word Problems on Multiplication of Decimals
7.8.4.
Word problems on Division of Decimals
7.8.5.
Word problems on Mixed Operations on Decimals
8.
Simplification
8.1.
Numerical Expressions (PEMDAS/BODMAS)
9.
Ratio and Proportion
9.1.
Ratio
9.1.1.
Equivalent Ratio
9.1.2.
Ratio and its Simplest Form
9.1.3.
Ratio of Two Quantities by Converting Them in Same Units
9.1.4.
Comparison of Ratios
9.2.
Proportion
9.2.1.
The Condition for the Given Numbers/Ratios to be in Proportion
9.2.2.
Find the Unknown Variable When Three/Four Numbers are in Proportion
9.3.
Word Problems On Ratio And Proportion
10.
Unitary Method
11.
Algebraic Expressions
11.1.
Operations on Literals and Numbers
11.2.
Variables and Constants
11.3.
Powers of a Literal And Coefficients of an Algebraic Expression
12.
Linear Equations in One Variable
12.1.
Understanding Linear Equation
12.2.
Writing Statements as Equations and Vice Versa
12.3.
Verify that the Given Solution is the Solution of the Linear Equation
12.4.
Solving Linear Equations
12.5.
Word Problems Based on Linear Equations
13.
Mensuration
13.1.
Area of a Figure Composed of Unit Squares
13.2.
Perimeter of a Figure Composed of Unit Squares
13.3.
Perimeter of a Triangle
13.4.
Perimeter of Polygons
13.5.
Area and Perimeter of a Rectangle
13.6.
Area and Perimeter of a Square
13.7.
Circumference of a Circle
14.
Geometry
14.1.
Understand the Basic Terms in Geometry (Point, Line, Line Segment, Ray, and Plane)
14.2.
Types of Lines
14.2.1.
Count the Number of Line Segments
14.2.2.
Parallel Lines
14.2.3.
Perpendicular Lines
14.2.4.
Intersecting Lines
14.3.
Collinear and Non-Collinear Points
14.4.
Angle
14.4.1.
Introduction to Angles
14.4.2.
Interior and Exterior of An Angle
14.4.3.
Finding the Number of Angles in the Given Figure
14.4.4.
Types of an Angles
14.4.5.
Measuring an Angle by a Protractor
14.5.
Triangles
14.5.1.
Introduction to Triangles
14.5.2.
Types of Triangles by the Lengths of Sides
14.5.3.
Types of Triangles by Angles
14.5.4.
Angle Sum Property of a Triangle
14.5.5.
More about Triangle
14.6.
Quadrilateral
14.6.1.
Introduction to Quadrilaterals
14.6.2.
Special Types of Quadrilateral
14.6.3.
Angle Sum Property of a Quadrilateral
14.6.4.
More about Quadrilateral
14.7.
Polygon
14.7.1.
Curves
14.7.2.
Understanding Polygons
14.8.
Circle
14.8.1.
Introduction to Circle
14.8.2.
Radius and Diameter of a Circle
14.8.3.
More about Circle
15.
Three Dimensional (3-D) Shapes
15.1.
Identifying 3-D Shapes
15.2.
Faces, Edges and Vertices of 3-D Shapes (Cuboid, Cube, Cone, Cylinder, Sphere, Pyramid and Prism)
16.
Linear Symmetry
16.1.
Linear Symmetry Around Us
16.2.
Linear Symmetry in Geometric Figures and Alphabets
17.
Data Handling
17.1.
Introduction and Tabular Representation of Data
17.2.
Pictographs
17.2.1.
Introduction and Drawing Pictographs
17.2.2.
Interpreting Pictographs
17.3.
Bar graphs
17.3.1.
Drawing Bar Graphs
17.3.2.
Interpreting Bar Graphs
Grade 6 Sri Lanka School Math
Perimeter of Polygons
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