5.OA.A. Write and interpret numerical expressions.

• Picturing Factors in Different Orders
• Why Do We Need an Order of Operations?
• You Can Multiply Three Numbers in Any Order

5.OA.A.1. Use parentheses, brackets, or braces in numerical expressions, and evaluate expressions with these symbols.

• Bowling for Numbers
• Using Operations and Parentheses
• Watch Out for Parentheses 1

5.OA.A.2. Write simple expressions that record calculations with numbers, and interpret numerical expressions without evaluating them. For example, express the calculation “add $8$ and $7$, then multiply by $2$” as $2 \times (8 + 7)$. Recognize that $3 \times (18932 + 921)$ is three times as large as $18932 + 921$, without having to calculate the indicated sum or product.

• Comparing Products
• Seeing is Believing
• Video Game Scores
• Words to Expressions 1