Question
Bryan has 18 marbles.
Adam has 9 marbles.
How many less marbles does Adam have than Bryan?

  1. Which model should we draw?
    (1) Model Part-whole
    (2) Model Comparison
  2. Is the total given?
    (1) Yes
    (2) No
  3. Who gets the shorter bar?
    (1) Bryan
    (2) Adam
  4. Number of marbles that Adam has less than Bryan =
4 m
(a)

Click button first when a symbol is required. X

(b)

Click button first when a symbol is required. X

(c)

Click button first when a symbol is required. X

(d)

Click button first when a symbol is required. X

Bryan has 18 marbles.
Adam has 9 marbles.
How many less marbles does Adam have than Bryan?

  1. Which model should we draw?
    (1) Model Part-whole
    (2) Model Comparison
  2. Is the total given?
    (1) Yes
    (2) No
  3. Who gets the shorter bar?
    (1) Bryan
    (2) Adam
  4. Number of marbles that Adam has less than Bryan =