Lesson 4

Buildings and Plans

Est. Class Sessions: 2–3

Daily Practice and Problems

Teacher Notes
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Encourage use of and have readily available 200 Charts, base-ten pieces, cubes, and number lines. Ask students to share their solution strategies including use of paper-and-pencil strategies and tools used.

  1. 5 + 12 =  8 + 9
  2. 13 + 9 = 12 + 10
  3. 10 + 9 = 17 +  2
  4. Strategies will vary.

K. Balancing Equations

  1. 5 + 12 = + 9
  2. 13 + 9 = + 10
  3. 10 + 9 = 17 +
  4. Show or tell how you solved Question C.

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