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Can you multiply these numbers mentally?

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

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Can you multiply these numbers mentally?

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  1. Can you multiply these numbers mentally? x ( x 14) How can you make a multiplication problem easier?

  2. In this lesson you will learn to rewrite multiplication problems with rational numbers by using the associative property of multiplication.

  3. Order of Operations • Grouping Symbols • Exponents • Multiplication/Division worked left to right • Add/Subtract worked left to right

  4. Associative Property of multiplication 3 x 4 x 5 3 x 4 x 5 = 3 x 20 12 x 5 = 60 = 60 (a x b) x c = a x (b x c)

  5. Order of Operations (3 + 4) x 5 = 3 + (4 x 5) 35 ≠ 60

  6. x ( x 14) = 1 1 ( x ) x 14 = 2 1 x 14 = 7

  7. x (- x 25) = 1 1 ( x -) x 25 = 4 1 - = -6 = -6.25 x -25 =

  8. In this lesson you have learned to rewrite multiplication problems with rational numbers by using the associative property of multiplication.

  9. Rewrite the multiplication the problem using the associative property and then solve: - x ( x 10) = (- x ) x 10 = 5

  10. Rewrite the multiplication using the associative property and solve: (24 ÷ ) ÷ x x x

  11. Rewrite the multiplication the problem using the associative property and then solve: - x ( x 12) = (-20 x ) x =

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