Mathematics Standards of Learning for Virginia Public Schools (2023)

2.CE.1g

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Determine the missing number in an equation (number sentence) through modeling and justification with addition and subtraction within $20$ (e.g., $3 + \underline{\hspace{0.3cm}} = 5$ or $\underline{\hspace{0.3cm}}+ 2 = 5$; $5 – \underline{\hspace{0.3cm}}= 3$ or $5 – 2 = \underline{\hspace{0.3cm}}$).

Propose a mapping

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