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Learning Goal

1 of 1 in this cluster

Use addition and subtraction within 100 to solve one- and two-step word problems

Start lessonBegins with Situation types and unknowns · Slides

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2.OA.A.1

**2.OA.A.1**: Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

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2.OA.A.1: Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

What you'll learn

  1. Identify the problem situation type (adding to, taking from, putting together, taking apart, or comparing) in a one-step word problem
  2. Solve one-step addition and subtraction word problems within 100 with the unknown in the result position
  3. Solve one-step word problems within 100 with the unknown in the change or start position, writing an equation with a symbol (such as a box or question mark) for the unknown
  4. Represent any word problem with a labeled drawing (such as a tape diagram or number bond) and a matching equation
  5. Solve comparison word problems involving "more than" and "fewer than" within 100
  6. Solve two-step word problems within 100, writing a separate equation for each step with a symbol for each unknown

Slides

Step through the lesson, or watch it as a narrated video • 2 slide decks

1

Situation types and unknowns

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2

Comparison and two step problems

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