ハイパー小学生 -Ultra Brain-

Beyond 9×9. Ultra Brain is a math training app for elementary school students. It takes calculation from “memorizing” to working it out yourself, quickly and accurately. Four subjects, plus a “Flip side” with decimals, fractions, and negative numbers. Daily practice trains, little by little, skills beyond what school covers. [ Four subjects, three courses ] Every subject has Beginner (free), Intermediate, and Master courses. • Addition: Beginner has no regrouping, Intermediate has regrouping, Master is two-digit + two-digit. • Subtraction: the reverse of Addition. Master subtracts a two-digit number. No negative answers. • Multiplication: Beginner is up to 9×9, Intermediate up to 19×19, Master up to 99×99. • Division: with remainders. Divisor and answer are 1–9 in Beginner, 1–19 in Intermediate, 1–99 in Master. [ Step by step, at a comfortable pace ] 2 choices → 3 choices → 4 choices →…