Write and interpret simple numerical expressions.
Operations and Algebraic Thinking
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Write simple expressions that record calculations with numbers. For example, use 2 × (8+7) to express the calculation "add 8 and 7, then multiply by 2."
Interpret numerical expressions without evaluating them. For example, use conceptual understanding of multiplication to interpret 3 × (18939 + 921) as being three times as large as 18932 + 921 without calculating the indicated sum or product.