A
Explanation
Step 1
The associative property states that you can add or multiply regardless of how the numbers are grouped. By 'grouped' we mean 'how you use parenthesis', then the expression that takes to be solved is the easier,it is A or D, due to:
[tex]\begin{gathered} A)(50+50)+63=50+(50+63) \\ (100)+63=163\text{ } \\ D)(43+60)+40=43+(60+40) \\ (103)+40=143 \\ \end{gathered}[/tex]the A has twice the number 50, so it is easier
I hope this helps you
