Lesson 1

Invented Strategies

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

Discuss the sample problems first so that students may review. These are facts from Group A.

  1. 5; 2 + 3 = 5
  2. 1; 1 + 0 = 1
  3. 4; 4 − 2 = 2
  4. 6; 6 − 4 = 2
    5.     6 − 2 = 4

Ongoing Assessment

Use DPP item B to assess students' abilities to find the fact families for the facts in Group A [E9].

B. Fact Families: Group A

Solve the problems. Write the turn-around facts for Questions A and B. The turn-around fact for 3 + 1 = 4 is
1 + 3 = 4.

    A. 3 + 2 =            B. = 0 + 1


      ____________            ____________

Solve the problems. Write subtraction sentences for Questions C and D. The subtraction sentences for
1 + 3 = 4 are 4 − 3 = 1 and 4 − 1 = 3.

    C. 2 + 2 =            D. = 2 + 4


      ____________            ____________


                             ____________