To solve addition or subtraction using a simplifying strategy, break the numbers into smaller, manageable parts. For example, 47 + 36 decompose into (40 + 30) + (7 + 6) = 70 + 13 = 83 . Similarly, 82 - 37 break as (80 - 30) + (2 - 7) = 50 - 5 = 45 .
