Our third grade math worksheets continue earlier numeracy concepts and introduce division, decimals, roman numerals, calendars and new concepts in measurement and geometry. Our word problem worksheets review skills in real world scenarios. All worksheets are printable pdf files.The distributive property is a very deep math principle that helps make math work. It's the rule that lets you expand parentheses, and so it's really critical to understand if you want to get good at simplifying expressions. 7th Grade Math ID: 1 Name_____ Date_____ Period____ ©A K230 V1v41 PK 8uKtla I NSJo 6fAt sw Ja rkeY rL dLzCe.9 K BAUlYlB krNi8g JhYt9st NrDe7sle Hrwv Held 0.2 Distributive Property & Combining Like Terms Simplify each expression by combining like terms. 1) n − 9 + 10 2) 5a − 5a 3) r − 9r 4) −n − 5n In this problem we have to transform expressions using the commutative, associative, and distributive properties to decide which expressions are equivalent. Common mistakes are addressed, such as not distributing the 2 correctly. This task also addresses 6.EE.3. The distributive property can be used to write a sum as a product, or write a product as a sum. You can always draw a partitioned rectangle to help reason about it, but with enough practice, you should be able to apply the distributive property without making a drawing.