At Homeworkhelp.com, we don't feed students the answers to homework questions. Instead, we show them how to learn. Our curriculum developers are all experienced classroom teachers who know how to help students understand concepts--not just memorize them. Algebra Unit Before UbD Topic Associative, Commutative, and Distributive Properties; Order of Operations Activities 1. Direct instruction on the order of operations (PEMDAS): parentheses, exponents, multiplication, division, addition, subtraction. 2. In-class exercises on the order of operations. 3.