What properties were used in Step 1 and Step 2 of the solution (99 + 4) + 1 = (4 + 99) +
Chapter 1, Problem 1.4.11(choose chapter or problem)
What properties were used in Step 1 and Step 2 of the solution? (99 + 4) + 1 = (4 + 99) + 1 Step 1 = 4 + (99 + 1) Step 2 = 4 + 100 = 104
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