Math Shortcuts tricks, ADDITION,SUBTRACTION,MULTIPLICATION,DIVISION,SQUARING,SUMMATIONS Post author:algebra-calculators.com Post published:November 14, 2021 Post category:Math Shortcuts tricks Post comments:0 Comments Math Shortcuts tricks, ADDITION,SUBTRACTION,MULTIPLICATION,DIVISION,SQUARING, SUMMATIONS > 1. ADDITION X+Y; Y= 91~109, 191~209, 291~309 >2. SUBTRACTION Y-X; Y = 100, 1000, 10000 X-Y; Y = 91~109, 191~209, 291~309 >3. MULTIPLICATION X*11 X*Y; Y=9, 99, 999… X*Y; X, Y = 10~19 AB*AC; A = 1~9, B+C=10 A1*B1 X*15 >4. DIVISION X/5 >5. SQUARING X5²; X = 1, 2, 3…100, 101… 5A²; A = 0~9 4A²; A = 0~9 9A²; A = 0~9 10A²; A = 0~9 X1²; X = 1, 2, 3…100, 101… 6. SUMMATIONS Sum(X1,X2,…X10); X2=X1+1, X3=X2+1 … Related You Might Also Like Classification of math Shortcuts Tricks November 13, 2021 Subtraction Shortcut Tricks November 13, 2021 Statement – Assumptions Example Problems November 13, 2021 Leave a Reply Cancel replyCommentEnter your name or username to comment Enter your email address to comment Enter your website URL (optional) Save my name, email, and website in this browser for the next time I comment. Δ