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Fractions: simplifying, adding, multiplying and dividing
What a fraction means, how to simplify one, and the four operations — with a common denominator only when you need it.
শিক্ষার্থীরা সবচেয়ে বেশি যেসব বিষয়ে প্রশ্ন করে সেগুলোর সহজ ব্যাখ্যা। প্রতিটি পাঠ ধারণা থেকে শুরু করে, একটি উদাহরণ ধাপে ধাপে সমাধান করে, এবং Sumzo-র গণিত ইঞ্জিন দিয়ে উত্তর যাচাই করে — তারপর একটি ক্যালকুলেটর ও অনুশীলনী প্রশ্নের লিংক দেয়।
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What a fraction means, how to simplify one, and the four operations — with a common denominator only when you need it.
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Break numbers into primes, then use the prime factorisation to find the greatest common divisor and least common multiple.
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What a square root is, the perfect squares to know, how to simplify surds such as √180, and how to estimate roots like √65 without a calculator.
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What an equation is, what its solution means, and how to solve equations step by step — from one-step equations to fractions and two variables.
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Use inverse operations to get the unknown on its own, keep the equation balanced, and always check your answer.
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Factorising, completing the square, the quadratic formula and the discriminant — and how to tell which method to use.
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What slope measures, how to find it from two points, and how to write a line as y = mx + b.
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How to simplify radicals by taking out perfect-square factors, what simplest radical form means, and how to simplify radical expressions — with checked examples.
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What a rational equation is, how to solve rational equations by multiplying by the lowest common denominator, and why every answer must be checked.
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The steps for factoring polynomials — common factor first, then two, three or four terms — with worked examples, each checked by multiplying back out.
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Solving inequalities like equations — with one extra rule — and showing the answer on a number line, in interval notation and as a shaded region.
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A solution is a value that makes an equation true. How to check one, and examples with one solution, no solution, all real numbers and two solutions.
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A five-step method for solving word problems, the key words that turn into maths, and worked examples — ages, consecutive numbers, discounts and tickets.
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Three ways to graph an equation — a table of values, slope and intercept, and key points of a parabola — with worked examples and how to match a graph to its equation.
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Function notation, how to graph a function from its formula, how to find its domain and range, and how composite functions such as f(g(x)) work.
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What a polynomial is, how to simplify and expand polynomials, and how to solve polynomial equations by factoring — with checked examples.
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What rational expressions are, their excluded values, and how to simplify, multiply, divide, add and subtract them — then solve rational equations.
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A literal equation has several letters. Solving it means isolating one of them — the same moves as an ordinary equation, with letters instead of numbers.
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How to simplify the following kinds of expression: like terms, brackets, exponents and complex fractions (a fraction inside a fraction), each with checked examples.
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The questions that say “find x” — equations, angles on a line, triangle angles, Pythagoras and similar shapes — and the one idea behind all of them.
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How to find the solution to a system of equations three ways, then how to graph a system of inequalities: boundary lines, shading and the overlap.
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How a² + b² = c² finds a missing side of any right triangle, plus the triples worth remembering.
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Area formulas for rectangles, triangles, trapeziums and circles — and why the triangle formula has a half in it.
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The formula for the area of a trapezium (a trapezoid in the US), why it works, and worked examples — including finding a missing height or side.
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Scalene, isosceles and equilateral triangles — how to tell them apart, their angles, and how to find their area, including the area of an equilateral triangle.
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Is a square a quadrilateral? Yes — and a rectangle, a rhombus and a parallelogram. How the family fits together, plus polygon angle sums and areas.
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How to find the volume and surface area of a triangular prism, and the volume of cylinders and cones — one idea (area of the cross-section × length) behind most of them.
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The three trig ratios, the two special triangles that give exact values, and how degrees relate to radians.
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Three ways to describe a typical value, two ways to describe how spread out data is, and when to use each.
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Three statistics skills that come up again and again: turning a z-score into a percentile, finding quartiles in a data set, and counting with the combination formula.
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A derivative is the slope of a curve at a point. The power rule lets you differentiate any polynomial in one line.
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How to find the determinant of a matrix: the ad − bc rule for 2×2, cofactor expansion for 3×3, a shortcut for triangular matrices, and what a zero determinant tells you.
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How to solve percentage problems of all three kinds — a percentage of an amount, one number as a percentage of another, and percentage change — with checked examples.
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Simplify ratios, share amounts in a ratio, and solve proportions — the maths behind recipes, maps and scale models.
সমাধান করুন ।
প্রতিটি পাঠ এভাবেই চলে: একবারে একটি ছোট ধাপ, আর একটি যাচাইকৃত উত্তর।
প্রতিটি বিষয়কে এমন ছোট ধাপে ভাগ করুন যা আপনি আগেই জানেন। পাঠগুলো এটি আপনার জন্য করে — যেমন দ্বিঘাত সমীকরণ দ্বিঘাত সূত্রের আগে উৎপাদকে বিশ্লেষণ দিয়ে শুরু হয়।
স্বয়ংক্রিয় পরীক্ষায় Sumzo-র গণিত ইঞ্জিন বা ক্যালকুলেটর উদাহরণগুলো আবার সমাধান করে, তাই ভুল উত্তর পাঠ প্রকাশের আগেই ধরা পড়ে।
না। সব পাঠ পড়া বিনামূল্যে। অ্যাকাউন্ট শুধু আপনার অনুশীলনের অগ্রগতি সংরক্ষণ করে।