Lesson 9

Workshop: Reasoning from Known Facts

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X
  1. 0 + 1 =  1
  2. 0 + 2 =  2
  3.  3 = 3 + 0
  4.  4 = 4 + 0
  5. Zero plus any number is that number.
  6. 1 + 1 =  2
  7. 2 + 1 =  3
  8. 3 + 1 =  4
  9. 4 + 1 =  5
  10. The answer is the next counting number.

Ongoing Assessment

Use DPP item GG to assess students' fluency with the addition facts in Groups A–B [E7].

GG. Addition with Zeros and Ones

The shapes of rooms in a dollhouse are shown below.

  1. 0 + 1 =
  2. 0 + 2 =
  3. = 3 + 0
  4. = 4 + 0
  5. What happens when you add zero to a number?
    ______________________________________________

    ______________________________________________
  6. 1 + 1 =
  7. 2 + 1 =
  8. 3 + 1 =
  9. 4 + 1 =
  10. What happens when you add one to a number?
    ______________________________________________

    ______________________________________________