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PROPERTIES. LESSONS 1-4 AND 1-5. Lesson essential questions. What are properties and why are they important to understanding mathematics? How can you prove that order does not matter when adding or Multiplying? 3. How can you use the distributive property to multiply mentally?
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PROPERTIES LESSONS 1-4 AND 1-5
Lesson essential questions • What are properties and why are they important to understanding mathematics? • How can you prove that order does not matter when adding or • Multiplying? • 3. How can you use the distributive property to multiply mentally? • 4. How is the distributive property used to simplify algebraic expressions? • 5. What are some common mistakes when using the distributive property?
Properties They are statements that are true for any number.
Distributive • Commutative • Associative • Addition property of zero • Multiplication property of zero • Multiplication property of one
Commutative Propertymultiplication Order doesn’t matter A x B = B x A algebraic example 3 x 5 = 5 x 3 numerical example
Commutative Propertyaddition Order doesn’t matter A + B = B + A algebraic example 3 + 5 = 5 + 3 numerical example
Associative Property of addition (a + b) + c = a + (b + c) algebraic example (6 + 4) + 3 = 6 + (4 + 3) numerical example
Associative Property of multiplication (a · b) · c = a · (b · c) algebraic example (6 · 4) · 3 = 6 · (4 · 3) numerical example
Multiplication property of zero If you multiply any number by zero the product is Always zero. A x 0 = 0 algebraic example 5 x 0 = 0 numerical example
Addition property of zero If you add 0 to any number, the number stays the same. A + 0 = A algebraic example 5 + 0 = 5 numerical example
Multiplication property of one When you multiply any number by one the product is Always the original number. A x 1 = A algebraic example 5 x 1 = 5 numerical example
Distributive Property The distributive property combines addition and Multiplication. A(B+ C) = AB + AC ALGEBRAIC EXAMPLE 3( 5+ 20) = ( 3 X 5) + (3 X 20) NUMERICAL EXAMPLE
Distributive Property The distributive property combines subtraction and multiplication. A(B – C) = AB – AC Algebraic example 2 ( 5 – 3) = (2 x 5) – (2 x 3) Numerical example