CCSS.Math.Content.5.OA.A.1
The standard
Use parentheses, brackets, or braces in numerical expressions, and evaluate expressions with these symbols.
Common Core State Standards for Mathematics · Operations and Algebraic Thinking
What this standard means
Students need to read and solve numerical expressions that use grouping symbols. They should know that parentheses, brackets, and braces tell which part to do first. They also need to handle nested groups, like solving inside parentheses before brackets.
Mastery looks like students evaluating expressions accurately and explaining the order they used. They can also spot how grouping symbols change the value of an expression. Common trouble spots are working left to right without checking groups, losing track of nested symbols, and treating brackets as meaning something different from parentheses.
Ways to teach it
- Give students number cards and symbol cards, then have them build and evaluate three different expressions using the same numbers.
- Ask students to explain how the value changes in 8 + 4 × 3 when grouping symbols are placed in different spots.
- Use a four-question exit ticket with one expression using parentheses, one brackets, one braces, and one nested grouping.
- Show a grocery receipt total, then write expressions with groups for coupons, tax, and multi-item purchases.
Plan a lesson for CCSS.Math.Content.5.OA.A.1
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Write and interpret numerical expressions.
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Write and evaluate numerical expressions involving whole-number exponents.