@guinnessandmathguy: These Math Tricks Will Blow Your Mind Part 4 - Guinness And Math Guy 00:25 Trick 16: Adding & Subtracting Fractions 07:53 Trick 17: Multiplying by 9,99, 99999 etc 09:58 Trick 18: Algebraic Multiplication 19:34 Trick 19: Algebraic Division 23:16 Trick 20: Cubes of Numbers Near Base #maths #youtubeshorts #onlinecourses #onlinetutor #tipsandtricks #guinnessandmathguy #mathwise #mathtricks #blowyourmind