Lesson 2

Rule Machines

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

Use DPP item E to review addition and subtraction facts from Groups C–D. Possible strategies include counting up, counting back, and using doubles.

  1. 8 days; 11 − 3 = 8 days or 3 + 8 = 11 days
  2. 4 years; 7 − 3 = 4 years or 3 + 4 = 7 years
  3. 3 eggs; 6 − 3 = 3 eggs or 3 + 3 = 6 eggs

E. Subtraction Facts Problems

Solve the problems and write a number sentence for each.

  1. Emily counted 11 days until her cousin was coming to play. Three days passed. Now how many days until Emily’s cousin comes?




    Number sentence _______________________________________________________
  2. Emily is 3 years old. Her brother John is 7 years old. How many years older is John than Emily?




    Number sentence _______________________________________________________
  3. Rosa has 3 eggs. She needs 6 eggs to make a double batch of cookies. How many more eggs does Rosa need?




    Number sentence _______________________________________________________