Lesson 4

Subtract with Mental Math

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

Encourage students to share a variety of partitions and representations on the number line. Have base-ten pieces readily available.

  1. 2467 buttons
  2. Possible responses: 1000 + 1000 + 150 + 150 + 100 + 60 + 7 = 2467; 1000 + 1000 + 400 + 60 + 7 = 2467
  3. Possible response:

    image

O. Button Collection

Emily has a button collection. She showed how many buttons she has with base-ten shorthand.

image

  1. How many buttons are in Emily's collection?
  2. Write a matching number sentence.
  3. Show how a base-ten hopper would move from 0 to show the number of buttons.

image