# Distributive_Property_1-10

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```					Distributive Property

Chapter 1
Lesson 10
Objective
 Give the missing number in expressions
rewritten using the Distributive Property, and
use that property to compute mentally.
Warm Up
 Tell which property is shown.

1. 47 + 68 = 68 + 47
2. 568 = 568 x 1
3. (39 x 5) x 6 = 39 x (5 x 6)
Key Idea
 You can use the Distributive Property to
compute products mentally.
Vocabulary
 Distributive Property: Multiplying a sum by a
number produces the same result as
multiplying each addend by the number and
Example: 2 x (3 + 4) = (2 x 3) + (2 x 4)
 Break apart: Using the Distributive Property to
compute mentally.
Example A
Find 47 x 6 using mental math
 Break apart 47
(40 + 7)6
 Use the Distributive Property.
40(6) + 7(6)
240 + 42
282
Example B
Find (9)45 + (9)5 using mental math.
 Each product has a 9 as one of its factors.
 Use the Distributive Property.
9(45 + 5)
9(50)
450

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 views: 19 posted: 9/20/2011 language: English pages: 8