3.3 Wrapping Up Addition and Subtraction Within 1,000

Unit Goals

• Students use place value understanding to round whole numbers and add and subtract within 1,000. They also represent and solve two-step word problems using addition, subtraction, and multiplication and assess the reasonableness of answers.

Section A Goals

• Fluently add within 1,000 using algorithms based on place value and properties of operations.
• Use place value understanding to compose and decompose numbers.

Section B Goals

• Fluently subtract within 1,000 using algorithms based on place value, properties of operations, and the relationship between addition and subtraction.

Section C Goals

• Round whole numbers to the nearest multiple of 10 and 100.

Section D Goals

• Assess the reasonableness of answers.
• Solve two-step word problems using addition, subtraction, and multiplication.

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