ProblemSum vs digital PSAT math

Unlimited Singapore-style math word problems, every one worked step by step. Written for the exam that ends elementary school in Singapore — and for any child of 10 to 13 who wants a real challenge. Fractions, ratios, percentages, algebra, averages, rates, area and volume, and more. Not geometry from a figure, charts or patterns drawn as shapes — those are read off a picture, and this app writes word problems. No account. No subscription. No internet connection. Pay once and it's yours. NOT A WORKBOOK THAT RUNS OUT Most practice apps ship a fixed set of questions: work through them twice and your child is remembering answers instead of solving problems. ProblemSum has no such list. Every question is written the moment you ask for it, with its own names and numbers, and the solution follows those numbers — so there is no last page to reach. ROOM TO WORK IT OUT A scratch pad sits next to the question on iPad and Mac, and on an iPhone turned sideways; held upright, it slides up from below. Draw the model with a finger or Apple Pencil, or type the math. It never calculates: the first paper of Singapore's exam allows no calculator. WORKED THE WAY SINGAPORE TEACHES Tap Check Answer and the full solution opens, one tap from your own work. Most solutions start by naming the strategy Singapore students learn for that kind of problem — draw a model, before and after, work backward, make a supposition, guess and check — then show every line, with a check at the end. Most questions also show a second way to solve it; the rest point out the trap the question sets. WHY SINGAPORE In TIMSS, the international math study, Singapore's 4th graders came first in 2015, 2019 and 2023. In the OECD's PISA, taken by 15-year-olds, it has finished first or second in math in every round since 2009. Its methods — above all the bar model — are now used in classrooms and homeschools across the US. WHO IT'S FOR The questions are set at the level of that exam, Singapore's PSLE. That suits strong 5th graders and most 6th and 7th graders, and it works alongside any curriculum, at school or in a homeschool. Money is in dollars and cents, and every measure is metric. BAR MODELS, DRAWN PROPERLY Bars are drawn to scale with their units marked, the part that changes shaded, and brackets showing what's left. The rest is laid out the way it would be on paper: fractions stacked, ratios and money in their proper forms, and units carried through every line. WHAT IT COVERS, AND WHAT IT DOESN'T Ratios run deepest, then area and volume, fractions, whole numbers and percentages, then algebra, averages and rates, then decimals and measurement — with money, ages, time, discounts and sales tax running through them. What it doesn't do: geometry from a figure, charts and graphs, or patterns drawn as shapes. Those are read off a diagram rather than a paragraph, so a word-problem generator can't write them. The Info tab lists both sides of that line. ANSWER IT THE WAY YOU THINK OF IT $4.50 or 4.50. Three-quarters as 3/4 or 0.75. A time as 1:45 p.m., 1.45 p.m. or 1345. 120 cm³ or just 120. A right answer is never marked wrong for its punctuation. COME BACK TO WHAT YOU'VE DONE Recent questions stay on the device with your answers, marked right or wrong, your work and the full solution, and you can step through them one by one. ONE APP, EVERY LEARNER A profile for each child, each keeping its own score, so siblings can share an iPad without sharing a total. IPHONE, IPAD AND MAC One purchase covers all three. The screen rearranges itself as it changes shape — an iPhone turned sideways, an iPhone Duo opened — and nothing written is lost. With a keyboard, Command-N gives the next question and Command-Return checks your answer. WORKS ANYWHERE, TELLS NO ONE ProblemSum makes no network connections at all. No analytics, no ads, no data collection — everything is generated on the device and stays there. Spotted a mistake? Tell us at hello@problemsum.com.

This new application consists of 365 new exercises. Hundreds of math questions in both multiple-choice and grid-in formats with worked out solutions. it 's the only app for the new digital PSAT with Student - Produced Response (grid-in) exercises. !!!!!!!!!! The ultimate interactive book !!!!!!!!!! Here you can find an intensive preparation for the new digital PSAT's all-important Math section, and a valuable learning tool for college-bound students who need extra help in math and feel the need to raise their math scores. --> New, updated, more functional and easy-to-use display of exercises. --> Test creation, containing 22 exercises randomly selected from the 365 existing exercises of the application, following the digital PSAT specifications. --> Digital PSAT math Test creation, in 2 modules, containing 2x22 exercises randomly selected from the 365 existing exercises of the application, following the digital PSAT specifications. --> ***Automatic pagination of the test into 5 - 20 pages, depends on your system screen analysis*** --> Ability to save the test to the 'files' folder with print option given. --> The application creates a different test every time and in no case two tests can be the same. --> Creation, pagination, storage and printing of different tests each time. This app for the digital PSAT is unique in the world, provides you with everything you need to improve your Math score—guaranteed. 29 years of experience and a unique approach have led to the ultimate product that outdoes any other digital PSAT prep book or application. There are 365 exercises as follows: Algebra: 112 exercises Problem Solving and Data Analysis: 112 exercises Advanced Math: 98 exercises Geometry and Trigonometry: 43 exercises Students can access all exercises of the app in a lot of ways: A: exercises & solutions - by chapter B: exercises & solutions - by category C: play & learn - by chapter D: play & learn - by category E: as a digital PSAT TEST in 2 modules with 2x22 = 44 questions F: as a single TEST with 22 questions --> 365 practice questions with expert explanations in 31 chapters or 8 categories --> full theory with over than 400 examples --> Use of both multiple-choice and student-produced response question formats --> the only app with student - produced response exercises (grid-in) --> practice on each chapter separately - play & learn --> a different test for each student.The test questions are selected randomly from the 365 exercises, --> this app generates millions of different tests, --> you can save the test as a .pdf file --> Automatic pagination of the test into 5 - 20 pages --> millions of ****** printable ****** tests --> you can save the answers of the test as a .pdf file --> see the scores and subscores immediately --> save or print the scores as a .pdf file --> use the chronometer to control your test time --> each module last for 35 minute --> students get an alert when 5 minutes remain in the module --> digital PSAT 2-module test with 2x22 = 44 questions (following the specifications of the digital PSAT math test) --> Once time has expired for the first module, students are automatically advanced to the appropriate (higher- or lower-difficulty) second module and may not return to the questions in the first module. --> Each module is separately timed, and students can move backward and forward among questions in a given module before time runs out --> test with 22 questions ideally to be taught in a teaching hour. Try to finish it in 35 minutes --> you can see the solutions in portrait view or in landscape view ***** text books can not do all these ***** ***** the best, smartest and cheapest way to practice for the digital PSAT math TEST ***** The application presents only my point of view for the whole syllabus. Exercises have emerged from twenty-nine years of experience in teaching of Mathematics. Visit our blog: http://i-math-apps.blogspot.com/  for more videos, questions, comments, suggestions e.t.c.