Bryan has 80 marbles.
Adam has 20 marbles.
How many more marbles does Bryan have than Adam?
- Which model should we draw?
(1) Model Part-whole
(2) Model Comparison
- Is the total given?
(1) Yes
(2) No
- Who gets the shorter bar?
(1) Bryan
(2) Adam
- Number of marbles that Bryan has more than Adam = _____
(a)
Which model should we draw?
(1) Model Part-whole
(2) Model Comparison
We should draw a (2) Model Comparison.
(b)
Is the total given?
(1) Yes
(2) No
(2) The total is not given.
(c)
Who gets the shorter bar?
(1) Bryan
(2) Adam
Bryan has 80 marbles but Adam has 20 marbles.
20 is less than 80. So, (2) Adam gets the shorter bar.
(d)
Number of marbles that Bryan has more than Adam
= 80 - 20
= 60
Answer(s): (a) 2; (b) 2; (c) 2; (d) 60