# The Distributive Property of Multiplication

Post on 31-Dec-2015

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The Distributive Property of Multiplication. Grade 4 GLE 17. Recall the distributive property of multiplication over addition . . . symbolically: a (b + c) = a b + a c and pictorially (rectangular array area model):. b. c. a. a b. a c. An example: 6 x 13 - PowerPoint PPT PresentationTRANSCRIPT

The Distributive Property of MultiplicationGrade 4 GLE 17

Recall the distributive property of multiplication over addition . . . symbolically:

a (b + c) = a b + a cand pictorially (rectangular array area model):a ba cabc

An example: 6 x 13 using your mental math skills . . . symbolically:

6 (10 + 3) = 6 10 + 6 3and pictorially (rectangular array area model):6 106 36103

What about 12 x 23? Mental math skills?

(10+2)(20+3) = 1020 + 103 + 220 + 23

10 2010 3102032 322 20

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