Medium · 9 lessons · ★ 5.0

Subtraction Shortcuts: Borrow Less, Think MoreLesson 2 · 3 min5
Multiply Anything in Your HeadLesson 3 · 3 min5
Division Without the Long DivisionLesson 4 · 3 min5
Powers: Squares, Cubes & BeyondLesson 5 · 3 min5
Roots: Undo the PowerLesson 6 · 3 min5
The Tricky 11s: Patterns That Make Them EasyLesson 7 · 3 min5
Lucky 7s: Taming the Hardest Times TableLesson 8 · 3 min5
PEMDAS: The Order That Keeps Math From Falling ApartLesson 9 · 3 min5