Montanna needed to multiply 5 x 27.  If they remembered that 27 = 20 + 7, 5 x 20 = 100, 5 x 7 = 35 and they used those facts to solve the problem, what property(ies) of multiplication did they use?                             5 x 27 = 5 x (20 + 7) =  (5 x 20) + (5 x 7) = 100 + 35 = 135 (i)    commutative                      (ii)   associative           (iii)  distributive Choose one of the following answers below and show your work:   (i) only (ii) only (iii) only (i) and (ii) only

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Chapter1: Whole Numbers
Section1.4: Multiply Whole Numbers
Problem 341E: How confident do you feel about your knowledge of the multiplication facts? If you are not fully...
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Montanna needed to multiply 5 x 27.  If they remembered that 27 = 20 + 7, 5 x 20 = 100, 5 x 7 = 35 and they used those facts to solve the problem, what property(ies) of multiplication did they use?

                         

  5 x 27 = 5 x (20 + 7) =  (5 x 20) + (5 x 7) = 100 + 35 = 135

(i)    commutative                     

(ii)   associative          

(iii)  distributive

Choose one of the following answers below and show your work:

 

(i) only
(ii) only
(iii) only
(i) and (ii) only
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