CURRICULUM

Math Arithmetic: Four Difficulties, 4000 Levels

Math Arithmetic has four difficulties with 1000 levels each and ten questions per level; stabilize accuracy before moving up. 算术是代数与几何的基础；先保证正确率再提速。 Arithmetic levels mix mental math, fractions and ratios; the goal is clean, reliable calculation that later algebra steps can trust.

心算 A1Mental Math A11000 关分数 A2Fractions A21000 关比例 B1Ratios B11000 关混合 B2Mixed B21000 关

How it works

  1. Start at the lowest difficulty.
  2. Ten questions per level; clear one to unlock the next.
  3. Review at 1/3/7/14/30 days.

FAQ

Which difficulty?

Start at basic and move up when accuracy stays above 80%.

How many levels each?

1000.