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Grade 3 - The Number System
Standard 3.NS.1.10 - Practice applying specific properties of multiplication to solve an equation.
Students will be expected to apply mental mathematics strategies and number properties to develop quick recall of basic addition facts to 18 and related basic subtraction facts. • Performance Indicators - N10.01 Describe a mental mathematics strategy that could be used to determine a given basic addition fact up to 9 + 9. - N10.02 Explain how the commutative (order-doesnâ€™t-matter) property and the identity (no-changewith-zero) property can assist in addition fact learning. - N10.03 Describe a mental mathematics strategy that could be used to determine a given basic subtraction fact with minuends up to 18 and subtrahends up to 9. - N10.04 Recognize which facts could be determined by a given strategy. - N10.05 Quickly recall basic addition facts to 18 and related subtraction facts in a variety of contexts