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Grade 4 - Numbers, Operations and Relationships
Standard 4.NOR.1.1.4 - Analyze place value equations with tens, hundreds and thousands to find which is correct.
Calculation techniques • Use a range of techniques to perform and check written and mental calculations of whole numbers including - estimation - building up and breaking down numbers - rounding off and compensating - doubling and halving - using a number line - using addition and subtraction as inverse operations - using multiplication and division as inverse operations