Lesson 3

Birthday Party

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

TIMS Task

Encourage students to use the Addition Strategies Menu and Subtraction Strategies Menu in the Reference section of the Student Guide.

  1. 11,225
  2. 9565
  3. 1471
  4. 2501
  5. 5565
  6. 906
  7. Possible strategy: 2700 − 200 = 2500, then add one more, so it's 2501.
  8. Answers will vary.
    Possible response:
    I used friendly numbers.
    1000 − 100 = 900.
    This is close to 906.

H. Addition and Subtraction

Complete the following problems. Use your Addition Strategies Menu and Subtraction Strategies Menu. Check to see if your answer is reasonable.

  1. Show or tell how to solve Question 4 in your head or with a few quick notes.
  2. Show or tell how you decided your answer for Question 6 is reasonable.