Class 6 Mathematics Book

বাংলায় পড়তে চাও? দেখো: ষষ্ঠ শ্রেণির গণিত বই

The big event in class 6 mathematics is the arrival of letters. Until now arithmetic was about numbers; now letters begin to stand in for them — and that single change is where many students first start finding mathematics hard.

Why this year matters

In arithmetic the answer is a particular number; in algebra it is a relationship. Once that shift in thinking happens, everything from class 7 to class 10 stands on it; if it does not, each year piles new weight on the previous year’s incomplete understanding. Time spent on this book is an investment in the next four years.

Mathematics: learn it with interactive animations

An idea that is hard to picture from a still textbook diagram becomes obvious when you change the values yourself and watch it happen. Each simulation below comes with a full plain-language explanation, the formulas, solved examples, common mistakes and exam tips, so understanding and revision happen together.

• Pythagorean Theorem (Grade 8–10 · animation)
• Trigonometric Ratios and the Unit Circle (Grade 10–11 · animation)
• Quadratic functions and their graphs (Grade 9–11 · animation)
• Circle theorems (Grade 9–10 · animation)
• Heights and distances: elevation and depression angles (Grade 9–10 · animation)
• Probability: experimental vs theoretical probability (Grade 9–11 · animation)
• Arithmetic and Geometric Sequences (Grade 10–11 · animation)
• Mean, Median and Mode (Grade 9–10 · animation)
• Sets and Venn Diagrams (Grade 7–11 · animation)
• Linear equations: graphs, slope and simultaneous pairs (Grade 8–10 · animation)
• Graphs of sin, cos and tan (Grade 10–12 · animation)
• Completing the Square and the Quadratic Formula (Grade 9–10 · animation)
• Area of a Circle: Proof, Formula and Solved Problems (Grade 7–10 · animation)
• Volume and Surface Area of Solids: Cube, Cuboid, Cylinder, Cone, Sphere (Grade 8–10 · animation)
• Similar Triangles: Scale Factor, AA, SSS, SAS and Shadow Heights (Grade 8–10 · animation)
• Coordinate Geometry: Distance, Midpoint, Slope, Section Formula and Locus (Grade 9–11 · animation)
• Conic Sections: Circle, Ellipse, Parabola and Hyperbola (Grade 11–12 · animation)
• Function Transformations: Shifts, Stretches and Reflections (Grade 9–11 · animation)
• Derivative as the Slope of a Tangent: Secant to Tangent (Grade 11–12 · animation)
• Riemann Sums and Integration: Area Under a Curve (Grade 11–12 · animation)
• Limits and the ε–δ Definition: A Visual Guide (Grade 11–12 · animation)
• 3D Vectors: Sum, Dot Product and Cross Product (Grade 11–12 · animation)
• Matrix Transformations: Rotation, Reflection, Shear and the Determinant (Grade 11–12 · animation)
• Complex Numbers: Sum, Product, Powers and Roots on the Argand Plane (Grade 11–12 · animation)
• Binary Number System: Place Value, Conversion and Addition (Grade 9–12 · animation)

Download the book

The class 6 mathematics textbook, in both versions.

• Mathematics — Bangla version
• Mathematics — English version

The Bangla version and the English Version are different books — download the one matching your medium.

Where students get stuck

• Treating a letter as a mere symbol rather than an unknown number.
• Moving on with a weak base in fractions and decimals.
• Trying to solve mentally instead of writing the steps.
• Reading a worked example and assuming that counts as practice.

How to use this book

1. Cover the solution and work each example yourself.
2. Then do every problem in the exercise, not a selection.
3. Mark what you could not do and return to it a week later.
4. A little every day, not a lot once a week.

Read next

• Class 7 mathematics book
• Class 6 science book
• Mathematics animations and simulations
• All science and math animations