Lesson 2

Big Base-Ten Hoppers

Est. Class Sessions: 2–3

Daily Practice and Problems

Teacher Notes
X

TIMS Bit

Use this DPP item to practice the multiplication facts for the 2s and 3s by identifying multiples and factors.

  1. No; students may skip count: 2, 4, 6, 8, 10. Or, students may reason that a rectangle cannot be formed with 9 tiles using 2 tiles in each row.
  2. Yes; students may skip count: 3, 6, 9, 12, 15. Some students may say that 3 × 5 = 15. Others may say that a rectangle with 3 rows of 5 tiles can be formed. This rectangle would have 15 square-inch tiles.
  3. Yes; 18 ÷ 3 = 6; 3 evenly divides 18; 6 is a whole number.
  4. No; 7 ÷ 2 = 3.5; 3.5 is not a whole number.
  5. B. 24, 26, 28.

E. Multiples of a Number

  1. Is 9 a multiple of 2? Why or why not?
  2. Is 15 a multiple of 3? Why or why not?
  3. Is 3 a factor of 18? Why or why not?
  4. Is 2 a factor of 7? Why or why not?
  5. Fill in the circle by the group of three numbers greater than 21 that are multiples of 2.
    1. 18, 46, 94
    2. 24, 26, 28
    3. 22, 23, 24
    4. 34, 45, 56