can you multiply these numbers mentally?
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Can you multiply these numbers mentally?. x ( x 14). How can you make a multiplication problem easier?. In this lesson you will learn to rewrite multiplication problems with rational numbers by using the associative property of multiplication. Order of Operations Grouping Symbols - PowerPoint PPT PresentationTRANSCRIPT
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Can you multiply these numbers mentally?
x ( x 14)
How can you make a multiplication problem easier?
![Page 2: Can you multiply these numbers mentally?](https://reader035.vdocument.in/reader035/viewer/2022062811/568161d3550346895dd1cf67/html5/thumbnails/2.jpg)
In this lesson you will learn to rewrite multiplication problems with rational numbers by using
the associative property of multiplication.
![Page 3: Can you multiply these numbers mentally?](https://reader035.vdocument.in/reader035/viewer/2022062811/568161d3550346895dd1cf67/html5/thumbnails/3.jpg)
Let’s ReviewLet’s Review
Order of Operations1. Grouping Symbols2. Exponents3. Multiplication/Division worked left to
right4. Add/Subtract worked left to right
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Let’s ReviewLet’s Review
Associative Property of multiplication3 x 4 x 5 =
12 x 5 =3 x 4 x 53 x 20
60 = 60(a x b) x c = a x (b x c)
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Let’s ReviewA Common Mistake
Order of Operations
(3 + 4) x 5 = 3 + (4 x 5)35 ≠ 60
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Let’s ReviewCore Lesson
x ( x 14) =
( x ) x 14 =1
11
2 x 14 = 7
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Let’s ReviewCore Lesson
x (- x 25) =
( x -) x 25 =1
11
4 x -25 = - = -6 = -6.25
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In this lesson you have learned to rewrite multiplication problems with rational numbers by using the associative property of
multiplication.
![Page 9: Can you multiply these numbers mentally?](https://reader035.vdocument.in/reader035/viewer/2022062811/568161d3550346895dd1cf67/html5/thumbnails/9.jpg)
Let’s ReviewGuided Practice
Rewrite the multiplication the problem using the associative property and then solve:
- x ( x 10) =
(- x ) x 10 = 5
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Let’s ReviewExtension Activities
Rewrite the multiplication using the associative property and solve:
(24 ÷ ) ÷ x x x
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Let’s ReviewQuick Quiz
Rewrite the multiplication the problem using the associative property and then solve:
- x ( x 12) = (-20 x ) x =