Lesson 6

Adding and Subtracting in Space

Est. Class Sessions: 2

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

  1. 55
  2. 95
  3. 16; Possible response:
    3 × 6 = 18 and 3 × 5 = 15, count by 2s until you get between 15 and 18—that's 16.
  4. Answers will vary.

W. What Numbers Are We?

  1. I am more than 50 and less than 60. Both my digits are the same. Who am I?
  2. I am more than 2 × 45 and less than 2 × 50. 5 is one of my factors. Who am I?
  3. I am a multiple of 2. I am less than 3 × 6 but more than 3 × 5. Who am I? Show or tell how you solved the riddle.
  4. Make up your own riddle. Write it down and trade with a friend. Can you solve your friend's riddle?