Imagine Math Class 4 vs (Open Source) Mental Math

Master Maths with thousands of questions across dozens of topics based on India's CBSE Grade 4. - Take quizzes to test and improve your knowledge in each topic. - Track progress towards mastery of each subject - Learn concepts through detailed solutions for each question imagine Math is the world's most advanced Adaptive Math Application developed in partnership with the US Government’s AID Agency to help Indian students learn math. Hands down the most comprehensive application for mastering Grade 4 mathematics with over 15,000 practice questions across 30+ different topics. Students can gradually increase their mastery of each topic with solutions that improve their skills with each question. Class 4 Math Curriculum includes the following topics: Numbers * Read & Write Numbers * Comparing Numbers * Place & Face Value * Rounding Off & Skip Counting * Roman Numerals Addition * Addition with & without Regrouping * Addition Word Problems Subtraction * Subtraction with & without Regrouping * Subtraction Word problems Addition & Subtraction * Addition & Subtraction Together Multiplication * Multiplication Properties * Multiplication Practice * Multiplication Word Problems Division & Unitary Method * Long Form Division * Division Word Problems * Unitary Method - Word Problems Multiples & Factors * Identifying Multiples & Calculating LCM * Identifying Factors and Calculating HCF * Prime/Composite Numbers & Prime Factors Fractions * Introduction to Fractions * Manipulation of Fractions Measurement Perimeter & Area * Perimeter and Area * Convert, Add & Subtract Measurements Time & Money * Units of Money * Reading Time, Conversions & Calendar Shapes Patterns & Data Handling * Introduction to Shapes & Symmetry * Using Tables, Pictographs & Bar Graphs * Patterns of Shapes & Numbers

A free, open-source mental math trainer. No ads, no paywalls, no locked content — every exercise and difficulty is included. Sharpen your arithmetic with quick timed tests, custom drills, and a library of mental-math tricks. Everything runs offline and your progress stays on your device. FEATURES Timed Tests A daily 60-second challenge plus sprints, a two-minute marathon, per-operation tests, and a hard mixed test — at four difficulty levels, each with best scores. Custom Trainer Pick a number domain (Times tables, Natural, Decimal, Money, Huge), choose one or more exercises, and set per-exercise difficulty from Easy to Super hard. All the Operations Addition, subtraction, multiplication, division, squares, square roots, fractions, percentages, and modulo. Mental Math Tricks Dozens of step-by-step tricks for faster addition, subtraction, multiplication, division, and squares — with worked examples and favorites. Practice Any Trick Every trick comes with a 60-second drill built for it: × 11 drills, squares ending in 5, numbers near 100, and more. Magic Square A number puzzle: make every row, column, and diagonal add up to the same total. Four levels, from 1-9 up to bigger number sets. Progress Tracking Solved totals, accuracy, best run, daily streak, longest streak, and a weekly activity view. Fast Sessions An on-screen keypad with instant answer checking and haptics. No ads. No paywalls. No account required. 100% Open Source The complete source code is public - see it, audit it, or contribute at https://github.com/Open-Apps-Studio/mental-math