Question

Patti is using mental math to evaluate the expression (70 + 12.8 + 30) + 6.1. She recognizes that the expression will be easier to simplify if she can combine 70 and 30 before she works with the other numbers. How do the properties of operations allow Patti to take that approach?

Answer 1

Step-by-step explanation:

It is called as the associative property of numbers,

that is,

(a + b) + c = a + (b + c)

Hence, even if she decide to add 70 and 30 first his answer will not go wrong.

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