Respuesta :
The missing statements in the drop down menu is Distributive property, Commutative Property.
What is Commutative Property of Addition ?
According the commutative property of Addition, the sum remains unchanged when the sequence of numbers is interchanged.
a+b = b+a
The step 1 uses the Distributive property
a(b +c) = a.b + a.c
The step 3 used Commutative Property
a+b = b+a
To know more about Commutative Property of Addition
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