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Answer:

associative property of addition.

In step 3:

1 + 19

20

Here we will add the integers, so division and multiplication eliminated.

  • Inverse property of addition is: a + (-a) = 0, which will result 0 always

Indicate which property is illustrated in step 3?

[tex] \rm \: Step \: 3 \asymp > 1 + 19[/tex]

  • Associative property of addition

This property states that when performing addition, how numbers are grouped will not change the resulting sum...~