Lesson 4

Exploring with Base-Ten Pieces

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

Use DPP item K to practice the addition facts in Group E.

  1. 12
  2. 120
  3. 13
  4. 130
  5. 14
  6. 140
  7. 12
  8. 120
  9. 12
  10. 120
  1. Answers will vary. Students should recognize that the answer to Question D is ten times the answer for Question C. 130 is ten thirteens.

K. Addition Practice with Tens

  1. 9 + 3 =
  2. 90 + 30 =
  3. 5 + 8 =
  4. 50 + 80 =
  5. = 9 + 5
  6. = 90 + 50
  7. = 8 + 4
  8. = 80 + 40
  9. 10 + 2 =
  10. 100 + 20 =
  1. Explain how your answer to Questions C and D are different.