Kazuasobi Math Drill

A daily arithmetic practice app for elementary school children. It covers the full elementary curriculum from grade 1 to grade 6 as timed drills, and records your best time and best score for every course. ■ Units unlock by grade 47 units, from counting in grade 1 to ratios in grade 6. Only the units up to the grade you choose will appear, so children never get stuck on something they have not been taught yet. ■ Built for the calculation cards used as homework 90 addition cards from 1+1 to 10+9, plus the 90 subtraction cards that mirror them. Work through the same deck used at school while the timer runs. ■ Problems adapt to the child The app looks at how quickly a question is answered, not only whether it was right, and picks problems at a difficulty that fits. Not so easy that it gets boring, not so hard that the child stops. ■ Word problems start with building the equation Read the sentence, choose the equation, then calculate. Change a setting and the child writes the equation themselves. The answer needs a unit too, so units never get forgotten. ■ Mental arithmetic read aloud (soroban style) Questions are read out loud and answered from memory. ■ Hints show how to think, not the answer Number lines and diagrams show the approach. A hint never simply gives the result. ■ Mistakes come back later Missed questions are remembered and shown again after a gap, when they are just about to be forgotten. ■ Units included Grade 1 counting, addition, subtraction, carrying, borrowing Grade 2 two-digit arithmetic, times tables, units of length and weight, telling time Grade 3 division, remainders, long multiplication, large numbers, fractions, decimals Grade 4 rounding, decimal multiplication and division, like fractions, order of operations, area, angles Grade 5 multiples and factors, LCM and GCD, primes, unlike fractions, averages, percentages, speed, volume Grade 6 fraction multiplication and division, ratios, area of a circle, letters in equations Advanced positive and negative numbers, prime factorisation, classic Japanese word problems No ads. All records stay on the device.