MULTIPLYING 3-DIGIT BY 3-DIGIT NUMBERS

Views:
 
Category: Education
     
 

Presentation Description

No description available.

Comments

Presentation Transcript

Slide 1: 

MULTIPLYING 3-DIGIT BY 3-DIGIT NUMBERS USING MY MATH SHORTCUT RULE 988 X 987 12 13 975156 1000 = reference number (exact multiple of 10) 1000-988 = 12 1000-987 = 13 975 = common cross-difference 988-13 = 975 987-12 = 975 12X13 (reduced factors) 12 X 13 = 156 Write down 975 below the equation line and annex 156. FINAL ANSWER http://www.mymathshortcuts.com