Lesson 3

Filling Graduated Cylinders

Est. Class Sessions: 1

Daily Practice and Problems

Teacher Notes
X

Have desk number lines and 200 Charts readily available.

  1. no
  2. yes
  3. no
  4. closer to 100
  5. Possible response: Students may say that they know 75 + 25 = 100, so 72 + 25 will be more than 50 but less than 100. It will be close to 100 because 72 is close to 75.

E. Number Sense

   72 + 25

  1. Is the answer less than 50? __________________
  2. Is the answer between 50 and 100? __________________
  3. Is the answer more than 100? __________________
  4. Is the answer closer to 75 or 100? __________________
  5. Show or tell how you estimated 75 + 25.