Question
Bryan has 50 marbles.
Adam has 40 less marbles than Bryan.
How many marbles does Adam have?

  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 = _____
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 50 marbles.
Adam has 40 less marbles than Bryan.
How many marbles does Adam have?

  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 = _____