2.7 Adding and Subtracting within 1,000

Unit Goals

• Students use place value understanding, the relationship between addition and subtraction, and properties of operations to add and subtract within 1,000.

Section A Goals

• Add and subtract numbers within 1,000 without composition or decomposition, and use strategies based on the relationship between addition and subtraction and the properties of operations.

Section B Goals

• Add numbers within 1,000 using strategies based on place value understanding, including composing a ten or hundred.

Section C Goals

• Subtract numbers within 1,000 using strategies based on place value understanding, including decomposing a ten or hundred.

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