emile_labs

3 ms·

1. 1.▲
   by emile_labs 3mo ago

   There is, and it's basically touch typing. Past a certain point you stop reading each cell. You hold the row number in your head and sweep along the column numbers, computing one answer ahead of where your writing. Easy-rows-first is t
2. 2.▲
   Show HN: Math Grid – Japan's 100-square math drill (hyakumasu keisan)(apps.apple.com)

   1 points by emile_labs 3mo ago|3 comments
3. 3.▲
   by emile_labs 3mo ago

   In Japanese primary schools there's a drill called 百ます計算 — numbers across the top and side, an operation in the corner, race the clock filling every cell. I grew up on it. Twenty-five years later I caught myself scribbling grids for my