A student solved this problem. Use the drop-down menus to justify steps 1 and 3. 8 + [4(16 + 23)] Step 1: 8 + [4(16) + 4(23)] Step 2: 8 + (64 + 92) Step 3: 8 + (92 + 64) Step 4: (8 + 92) + 64 Step 5: 100 + 64 Step 6: 164

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Answer:

Step 1: Distributive Property. Step 3 Commutative Property.

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

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