MathBoard Addition vs RPN 48

The perfect starting point for mastering addition—now with iCloud Sync, Apple Pencil, speech input, and support for iPadOS 26’s new windowing system. MathBoard® Addition is the FREE “addition only” version of the award-winning MathBoard app, designed to help students of all ages learn to solve math problems—not just memorize answers. This highly configurable app adapts to each student’s skill level, from early learners beginning with single-digit addition to more advanced students tackling algebra-style equations. Whether at home or in the classroom, MathBoard Addition provides a supportive, hands-on learning environment that promotes true comprehension. Students can solve problems using a built-in scratchboard, get help through the step-by-step Problem Solver, and engage with learning activities like Find the Sign, Equality/Inequality, and Match Math (a memory game). Best of all, the app grows with your learner—difficulty settings, question styles, and number ranges are all customizable. Key Features • Configurable number ranges and digit formats (e.g., two-digit over one-digit) • Smart “wrong answer” generation to reduce guessing • Algebra-style equation support (e.g., 6 + x = 12) • Multiple answer formats: multiple choice and fill-in-the-blank • Built-in Problem Solver teaches step-by-step solutions • Built-in scratchboard for working out problems • Quick reference tables for counting and addition • Timed activities with countdown or stopwatch options • Save and share equation settings or student results • Support for multiple student profiles Optimized for the Latest Apple Tech • iCloud Syncing across devices • Apple Pencil and Magic Keyboard support • Speech Input and Text to Speech • iPadOS 26 windowing for multitasking Whether you’re teaching in the classroom or practicing at the kitchen table, MathBoard Addition offers a focused and engaging way to build math confidence—one equation at a time.

The HP 48 is the calculator of a generation of engineers, physicists and students: the 48SX of 1990 brought RPN, RPL programming, units, symbolic algebra and graphing into one machine, the 48GX of 1993 added the equation library, the solver applications, more memory and a faster processor. Thirty years on, many still keep one on their desk — and this app puts one in your pocket. RPN 48 is not an imitation: it emulates the calculator's hardware — the Saturn processor, the memory controllers, the 131×64 display, the keyboard, the timers — and runs HP's original ROM, so it behaves exactly as the real machine: every function, every menu, every flag, every quirk. THE CALCULATOR • RPN with the four-level stack (and unlimited stack depth), or algebraic entry, at your choice • Symbolic algebra: expressions, simplification, derivatives, integrals, Taylor series, equation solving; exact rational and integer arithmetic • Scientific calculator: complex numbers, vectors and matrices, statistics and regressions, unit conversions with dimensional analysis, base conversions (BIN/OCT/HEX), numeric solver, financial (TVM) calculations, dates and times • Graphing: function, polar, parametric, conic, differential equation, statistics and 3D plots, with zoom and trace • The 48G series' Equation Library with 300 equations of physics and engineering, with units • Programmable in RPL: your programs run as on the real machine THE APP • Both models: the HP 48GX (ROM revisions R and P, the 48G series' 128 KB) and the HP 48SX (ROM revisions J and E), each at its own speed and with its own memory • Your calculator's memory stays: close the app, come back later, it is exactly where you left it • HP's manuals (Quick Start Guide, User's Guide, Advanced User's Reference) can be downloaded into the app and read next to the calculator; the app remembers your page • Hardware keyboard support on iPad and iPhone • Works fully offline, no account, no ads, no tracking ABOUT THE ROM The app contains no HP software. On first launch you pick a model and its ROM image is downloaded from hpcalc.org, the community archive where HP allowed the HP 48 ROMs to be published in 2000, exactly as you would with a browser; the image is then kept on your device. HP, HP 48, HP 48SX and HP 48GX are trademarks of HP Inc. This app is an independent project and is not affiliated with or endorsed by HP.