Chrono Math: mental math

Chrono Math turns mental arithmetic into an athletics meet. Each school year is a track, each skill an event, and your child pins on a race bib to beat their own records in just a few minutes a day.

7 tracks, Grade 1 to Grade 7
74 events in the order topics are taught at school: number bonds to 10, doubles and halves, times tables, bonds to 100 and 1,000, quotient and remainder, decimals, fractions, percentages, divisibility rules, order of operations, negative numbers, simple algebra, proportion, rounding…

Four ways to race
• Practice: 10 questions on one event, getting harder, to earn up to 3 stars
• Beat the clock: as many right answers as possible in 60 seconds
• Survival: 3 lives, and the difficulty keeps rising
• Daily race: 15 questions, the same for every player that day

Always fresh questions
Calculations are generated every game: no way to memorise the answers, you really have to work them out.

Learn from mistakes
After a wrong answer, the right one appears with an explanation of the method: bridging through ten, splitting a number, using the tables…

Plenty to stay motivated
• 40 medals to hang in your trophy case
• 15 ranks, from Math Seedling to Mental Math Legend
• Stars for each event and a trophy at the finish line of every track
• Personal records and daily streaks

Made for kids
Large built-in number pad, big buttons, sounds and animations, easy to read on phones and tablets. Interface in English and French, no ads. Progress is saved to the Google account and restored on another device.

Chrono Math is published by Maths PDF (maths-pdf.fr), a French website of maths lessons and worked exercises for every school year.