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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