Chapter 1

Knowing Our Numbers

Introduction

medium • 1 min read

Large Numbers In Practice

medium • 2 min read

Using Brackets

medium • 3 min read

Roman Numerals

medium • 4 min read

Estimation

medium • 5 min read

Chapter 2

Whole Numbers

Introduction

medium • 1 min read

Whole Numbers

medium • 2 min read

The Number Line

medium • 3 min read

Properties of Whole Numbers

medium • 4 min read

Chapter 3

Playing with Numbers

Introduction

medium • 1 min read

Factors and Multiples

medium • 2 min read

Prime and Composite Numbers

medium • 3 min read

Tests for Divisibility of Numbers

medium • 4 min read

Common Factors and Common Multiples

medium • 5 min read

Some More Divisibility Rules

medium • 6 min read

Prime Factorisation

medium • 7 min read

Chapter 4

Basic Geometrical Ideas

Introduction

medium • 1 min read

Points

medium • 2 min read

A Line Segment

medium • 3 min read

A Line

medium • 4 min read

Intersecting Lines

medium • 5 min read

Parallel Lines

medium • 6 min read

Chapter 5

Understanding Elementary Shapes

Introduction

medium • 1 min read

Measuring Line Segments

medium • 2 min read

Angles - 'Right' and 'Straight'

medium • 3 min read

Angles - 'Acute', 'Obtuse' and 'Reflex'

medium • 4 min read

Measuring Angles

medium • 5 min read

Perpendicular Lines

medium • 6 min read

Classification of Triangles

medium • 7 min read

Quadrilaterals

medium • 8 min read

Chapter 6

Integers

Introduction

medium • 1 min read

Integers

medium • 2 min read

Addition of Integers

medium • 3 min read

Subtraction of Integers with the help of a Number Line

medium • 4 min read

Chapter 7

Fractions

Introduction

medium • 1 min read

A Fraction

medium • 2 min read

Fraction on the Number Line

medium • 3 min read

Proper Fractions

medium • 4 min read

Improper and Mixed Fractions

medium • 5 min read

Equivalent Fractions

medium • 6 min read

Chapter 8

Decimals

Introduction

medium • 1 min read

Tenths

medium • 2 min read

Hundredths

medium • 3 min read

Comparing Decimals

medium • 4 min read

Using Decimals

medium • 5 min read

Chapter 9

Data Handling

Introduction

medium • 1 min read

Recording Data

medium • 2 min read

Organization of Data

medium • 3 min read

Pictograph

medium • 4 min read

Chapter 10

Mensuration

Introduction

medium • 1 min read

Perimeter

medium • 2 min read

Area

medium • 3 min read

Area of a Rectangle

medium • 4 min read

Chapter 11

Algebra

Introduction

medium • 1 min read

Matchstick Patterns

medium • 2 min read

The Idea of a Variable

medium • 3 min read

More Matchstick Patterns

medium • 4 min read

More Examples of Variables

medium • 5 min read

Chapter 12

Ratio and Proportion

Introduction

medium • 1 min read

Ratio

medium • 2 min read

Proportion

medium • 3 min read

Chapter 13

Symmetry

Introduction

medium • 1 min read

Making Symmetric Figures: Ink-blot Devils

medium • 2 min read

Figures with Two Lines of Symmetry

medium • 3 min read

Chapter 14

Practical Geometry

Introduction

medium • 1 min read

The Circle

medium • 2 min read

A Line Segment

medium • 3 min read

Perpendiculars

medium • 4 min read

Angles

medium • 5 min read

Construction of Angles of Special Measures

medium • 6 min read