The latest edition of my Number Sense Manual:
Number Sense Tricks (Rev A) // 4-12-2018
[Update: 8-29-2018] I originally planned to have a second revision of the manual done prior to the start of the 2018/2019 school year (with a much more expanded problem section), but I fell short on time and only got a quarter of the way through. I’m hoping to finish it by this time next year – will keep you posted!
If you have any individual questions on how to quickly solve test problems, feel free to e-mail me at: . I’ve already gotten several dozen inquiries and I always like getting feedback from users, so thanks!